We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Remove chainer.functions.caffe.CaffeFunction
This is left for backward compatibility.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `chainer/functions/caffe/__init__.py`
Content:
```
1 from chainer.links.caffe import caffe_function
2 
3 
4 # for backward compatibility
5 CaffeFunction = caffe_function.CaffeFunction
6
```

Path: `setup.py`
Content:
```
1 #!/usr/bin/env python
2 
3 from setuptools import setup
4 
5 
6 setup_requires = []
7 install_requires = [
8     'filelock',
9     'nose',
10     'numpy>=1.9.0',
11     'protobuf',
12     'six>=1.9.0',
13 ]
14 
15 setup(
16     name='chainer',
17     version='2.0.0a1',
18     description='A flexible framework of neural networks',
19     author='Seiya Tokui',
20     author_email='tokui@preferred.jp',
21     url='http://chainer.org/',
22     license='MIT License',
23     packages=['chainer',
24               'chainer.dataset',
25               'chainer.datasets',
26               'chainer.functions',
27               'chainer.functions.activation',
28               'chainer.functions.array',
29               'chainer.functions.caffe',
30               'chainer.functions.connection',
31               'chainer.functions.evaluation',
32               'chainer.functions.loss',
33               'chainer.functions.math',
34               'chainer.functions.noise',
35               'chainer.functions.normalization',
36               'chainer.functions.pooling',
37               'chainer.functions.theano',
38               'chainer.functions.util',
39               'chainer.function_hooks',
40               'chainer.iterators',
41               'chainer.initializers',
42               'chainer.links',
43               'chainer.links.activation',
44               'chainer.links.caffe',
45               'chainer.links.caffe.protobuf2',
46               'chainer.links.caffe.protobuf3',
47               'chainer.links.connection',
48               'chainer.links.loss',
49               'chainer.links.model',
50               'chainer.links.model.vision',
51               'chainer.links.normalization',
52               'chainer.links.theano',
53               'chainer.optimizers',
54               'chainer.serializers',
55               'chainer.testing',
56               'chainer.training',
57               'chainer.training.extensions',
58               'chainer.training.triggers',
59               'chainer.utils'],
60     zip_safe=False,
61     setup_requires=setup_requires,
62     install_requires=install_requires,
63     tests_require=['mock',
64                    'nose'],
65 )
66
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/chainer/functions/caffe/__init__.py b/chainer/functions/caffe/__init__.py
deleted file mode 100644
--- a/chainer/functions/caffe/__init__.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from chainer.links.caffe import caffe_function
-
-
-# for backward compatibility
-CaffeFunction = caffe_function.CaffeFunction
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,6 @@
               'chainer.functions',
               'chainer.functions.activation',
               'chainer.functions.array',
-              'chainer.functions.caffe',
               'chainer.functions.connection',
               'chainer.functions.evaluation',
               'chainer.functions.loss',

{"golden_diff": "diff --git a/chainer/functions/caffe/__init__.py b/chainer/functions/caffe/__init__.py\ndeleted file mode 100644\n--- a/chainer/functions/caffe/__init__.py\n+++ /dev/null\n@@ -1,5 +0,0 @@\n-from chainer.links.caffe import caffe_function\n-\n-\n-# for backward compatibility\n-CaffeFunction = caffe_function.CaffeFunction\ndiff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -26,7 +26,6 @@\n               'chainer.functions',\n               'chainer.functions.activation',\n               'chainer.functions.array',\n-              'chainer.functions.caffe',\n               'chainer.functions.connection',\n               'chainer.functions.evaluation',\n               'chainer.functions.loss',\n", "issue": "Remove chainer.functions.caffe.CaffeFunction\nThis is left for backward compatibility.\n", "before_files": [{"content": "from chainer.links.caffe import caffe_function\n\n\n# for backward compatibility\nCaffeFunction = caffe_function.CaffeFunction\n", "path": "chainer/functions/caffe/__init__.py"}, {"content": "#!/usr/bin/env python\n\nfrom setuptools import setup\n\n\nsetup_requires = []\ninstall_requires = [\n    'filelock',\n    'nose',\n    'numpy>=1.9.0',\n    'protobuf',\n    'six>=1.9.0',\n]\n\nsetup(\n    name='chainer',\n    version='2.0.0a1',\n    description='A flexible framework of neural networks',\n    author='Seiya Tokui',\n    author_email='tokui@preferred.jp',\n    url='http://chainer.org/',\n    license='MIT License',\n    packages=['chainer',\n              'chainer.dataset',\n              'chainer.datasets',\n              'chainer.functions',\n              'chainer.functions.activation',\n              'chainer.functions.array',\n              'chainer.functions.caffe',\n              'chainer.functions.connection',\n              'chainer.functions.evaluation',\n              'chainer.functions.loss',\n              'chainer.functions.math',\n              'chainer.functions.noise',\n              'chainer.functions.normalization',\n              'chainer.functions.pooling',\n              'chainer.functions.theano',\n              'chainer.functions.util',\n              'chainer.function_hooks',\n              'chainer.iterators',\n              'chainer.initializers',\n              'chainer.links',\n              'chainer.links.activation',\n              'chainer.links.caffe',\n              'chainer.links.caffe.protobuf2',\n              'chainer.links.caffe.protobuf3',\n              'chainer.links.connection',\n              'chainer.links.loss',\n              'chainer.links.model',\n              'chainer.links.model.vision',\n              'chainer.links.normalization',\n              'chainer.links.theano',\n              'chainer.optimizers',\n              'chainer.serializers',\n              'chainer.testing',\n              'chainer.training',\n              'chainer.training.extensions',\n              'chainer.training.triggers',\n              'chainer.utils'],\n    zip_safe=False,\n    setup_requires=setup_requires,\n    install_requires=install_requires,\n    tests_require=['mock',\n                   'nose'],\n)\n", "path": "setup.py"}], "after_files": [{"content": null, "path": "chainer/functions/caffe/__init__.py"}, {"content": "#!/usr/bin/env python\n\nfrom setuptools import setup\n\n\nsetup_requires = []\ninstall_requires = [\n    'filelock',\n    'nose',\n    'numpy>=1.9.0',\n    'protobuf',\n    'six>=1.9.0',\n]\n\nsetup(\n    name='chainer',\n    version='2.0.0a1',\n    description='A flexible framework of neural networks',\n    author='Seiya Tokui',\n    author_email='tokui@preferred.jp',\n    url='http://chainer.org/',\n    license='MIT License',\n    packages=['chainer',\n              'chainer.dataset',\n              'chainer.datasets',\n              'chainer.functions',\n              'chainer.functions.activation',\n              'chainer.functions.array',\n              'chainer.functions.connection',\n              'chainer.functions.evaluation',\n              'chainer.functions.loss',\n              'chainer.functions.math',\n              'chainer.functions.noise',\n              'chainer.functions.normalization',\n              'chainer.functions.pooling',\n              'chainer.functions.theano',\n              'chainer.functions.util',\n              'chainer.function_hooks',\n              'chainer.iterators',\n              'chainer.initializers',\n              'chainer.links',\n              'chainer.links.activation',\n              'chainer.links.caffe',\n              'chainer.links.caffe.protobuf2',\n              'chainer.links.caffe.protobuf3',\n              'chainer.links.connection',\n              'chainer.links.loss',\n              'chainer.links.model',\n              'chainer.links.model.vision',\n              'chainer.links.normalization',\n              'chainer.links.theano',\n              'chainer.optimizers',\n              'chainer.serializers',\n              'chainer.testing',\n              'chainer.training',\n              'chainer.training.extensions',\n              'chainer.training.triggers',\n              'chainer.utils'],\n    zip_safe=False,\n    setup_requires=setup_requires,\n    install_requires=install_requires,\n    tests_require=['mock',\n                   'nose'],\n)\n", "path": "setup.py"}]}