How to remove a category in WordPress?
If you want to remove the WordPress category then follow this instruction:
1. log in to your WordPress admin dashboard.
2. Under the dashboard menu, hover your mouse on Posts and then click on "Categories".
3. On the right side you can see a list of categories. Hover your mouse on a category you wish to remove and a few options will appear. Click on the "Delete" option. The confirmation option will appear. Click on "OK".