Remove customizer and other includes?

[itsamoreh]

We shouldn't be needing any of the customizer related php includes. I think everything in /inc/customizer can be removed.

e.g. https://github.com/WebDevStudios/wd_f/blob/main/inc/customizer/customizer.php

[itsamoreh]

These can probably be removed as well: https://github.com/WebDevStudios/wd_f/blob/main/inc/hooks/print-customizer-footer-scripts.php https://github.com/WebDevStudios/wd_f/blob/main/inc/hooks/print-customizer-header-scripts.php https://github.com/WebDevStudios/wd_f/blob/main/inc/setup/content-width.php