QA:Testcase gnome-shell extensions remove

Setup

1. Follow the testing steps for extension installation and extensions.gnome.org.

How to test

1. In the Extensions app, remove an extension from the "Manually Installed" section.
2. Using DNF, remove the package for an extension that you previously installed using the package manager.

Expected Results

1. The Extensions app should successfully remove extensions in the "Manually Installed" section.
2. DNF should successfully remove extension packages.
3. After removal, the removed extensions should no longer be listed in the Extensions app or gnome-extensions list command.