We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Optional dependencies are required for deprecated logging module
🐛 Bug

There is a backwards compatibility issues coming from PR #767. Notably, if a user doesn't have any of the extra logging dependencies then they'll be an import error.

### To Reproduce

1. Remove all logging dependencies from your environment (E.g. comet)
2. Depend on the deprecated pytorch_lightning.logging package and run

### Expected behavior

We expect to maintain backwards compatibility here so optional dependencies shouldn't be required.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `pytorch_lightning/logging/__init__.py`
Content:
```
1 """
2 .. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0
3 """
4 
5 import warnings
6 
7 warnings.warn("`logging` package has been renamed to `loggers` since v0.6.1"
8               " and will be removed in v0.8.0", DeprecationWarning)
9 
10 from pytorch_lightning.loggers import *  # noqa: F403
11 from pytorch_lightning.loggers import (  # noqa: E402
12     base, comet, mlflow, neptune, tensorboard, test_tube, wandb
13 )
14
```
--- 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/pytorch_lightning/logging/__init__.py b/pytorch_lightning/logging/__init__.py
--- a/pytorch_lightning/logging/__init__.py
+++ b/pytorch_lightning/logging/__init__.py
@@ -8,6 +8,3 @@
               " and will be removed in v0.8.0", DeprecationWarning)
 
 from pytorch_lightning.loggers import *  # noqa: F403
-from pytorch_lightning.loggers import (  # noqa: E402
-    base, comet, mlflow, neptune, tensorboard, test_tube, wandb
-)

{"golden_diff": "diff --git a/pytorch_lightning/logging/__init__.py b/pytorch_lightning/logging/__init__.py\n--- a/pytorch_lightning/logging/__init__.py\n+++ b/pytorch_lightning/logging/__init__.py\n@@ -8,6 +8,3 @@\n               \" and will be removed in v0.8.0\", DeprecationWarning)\n \n from pytorch_lightning.loggers import *  # noqa: F403\n-from pytorch_lightning.loggers import (  # noqa: E402\n-    base, comet, mlflow, neptune, tensorboard, test_tube, wandb\n-)\n", "issue": "Optional dependencies are required for deprecated logging module\n\ud83d\udc1b Bug\r\n\r\nThere is a backwards compatibility issues coming from PR #767. Notably, if a user doesn't have any of the extra logging dependencies then they'll be an import error.\r\n\r\n### To Reproduce\r\n\r\n1. Remove all logging dependencies from your environment (E.g. comet)\r\n2. Depend on the deprecated pytorch_lightning.logging package and run\r\n\r\n### Expected behavior\r\n\r\nWe expect to maintain backwards compatibility here so optional dependencies shouldn't be required.\n", "before_files": [{"content": "\"\"\"\n.. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0\n\"\"\"\n\nimport warnings\n\nwarnings.warn(\"`logging` package has been renamed to `loggers` since v0.6.1\"\n              \" and will be removed in v0.8.0\", DeprecationWarning)\n\nfrom pytorch_lightning.loggers import *  # noqa: F403\nfrom pytorch_lightning.loggers import (  # noqa: E402\n    base, comet, mlflow, neptune, tensorboard, test_tube, wandb\n)\n", "path": "pytorch_lightning/logging/__init__.py"}], "after_files": [{"content": "\"\"\"\n.. warning:: `logging` package has been renamed to `loggers` since v0.6.1 and will be removed in v0.8.0\n\"\"\"\n\nimport warnings\n\nwarnings.warn(\"`logging` package has been renamed to `loggers` since v0.6.1\"\n              \" and will be removed in v0.8.0\", DeprecationWarning)\n\nfrom pytorch_lightning.loggers import *  # noqa: F403\n", "path": "pytorch_lightning/logging/__init__.py"}]}