Deleting custom post types , custom taxonomies and their data on unistalling
86859
How to delete custom taxonomy terms in plugin's uninstall.php?
8915
How can we get rid of misspelled and unused (or "zombie") tags?
79653
Building an archive of deleted questions
22305
Deleting external/auxiliary files?
35687
Clear item with custom name?
115890
How to create a permalink structure with custom taxonomies and custom post types like base-name/parent-tax/child-tax/custom-post-type-name
10740
How to modify a taxonomy that's already registered
102920
Deleting "undeletable" files in Vista
143383
Remove blog-like recent content from  page
2018
How to remove everything Ubuntu One-related?
104551
Can we implement the low quality flags to delete posts after a certain number of flags?
10000
cat_is_ancestor_of() for custom taxonomies
109271
How do I delete the entire history (Recently Used Items) in the dash?
100881
How do I delete "Removable Disk" listings?
106409
Don't automatically clear the possible comment abuse flags when a post is deleted by the owner
126947
Is it possible to automatically delete image files that have been uploaded when a node is not saved?
43241
Suggested edits to posts which no longer exist should be automatically removed