Fix current version breaking side menu (remove bootstrap, custom css, custom js, custom template) #174

Job	Run time
Python 3.12 Tests	35s
Python 3.11 Tests	32s
Python 3.10 Tests	34s
Python 3.9, with Code Coverage	38s
Python 3.9, Windows	1m 6s
Python 3.9, MacOS	1m 9s
Twine	34s
Document Checks	33s
Code Style Checks	46s
ASDF Standard Document Build	46s
ASDF Document Build	51s
ASDF-transform-schemas Document Build	52s
ASDF-coordinates-schemas Document Build	40s
ASDF-wcs-schemas Document Build	44s
ASDF-astropy Document Build	50s
rad Document Build	44s
roman_datamodels Document Build	43s
romancal Document Build	1m 16s
stdatamodels Document Build	1m 18s
jwst Document Build	2m 16s
	17m 27s

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