docs: remove remaining CSS workaround

[neocturne]

Remove a workaround for a CSS issue in older Firefox versions, which was recently fixed (at some point between Firefox 102 and 108). Firefox 108+ now displays the bullet points at the right vertical position even without the hack in [1].

[1] https://gluon.readthedocs.io/en/latest/releases/v2018.1.html#site-conf

Opening as a draft for now, as the current Extended Support Release is Firefox 102. I propose to merge this as soon as all Firefox versions without the fix are EOL.

[AiyionPrime]

So if the fix does not make it into an upcoming point version of 102.x ESR,
the latest this will be merged is the 26th September this year, when 102 goes EOL and 115 will be the only supported ESR? [1]

The next ESR release dates are 17th of this month (102.7), and 14th February (102.8);
the later being the one likely to include this fix.

[1] https://wiki.mozilla.org/Release_Management/Calendar

[AiyionPrime]

Line 104 to 107 in docs/conf.py should be gone as well, as this is effectively the last artifact of #2078, right?

96f1547#diff-85933aa74a2d66c3e4dcdf7a9ad8397f5a7971080d34ef1108296a7c6b69e7e3R104-R107

[neocturne]

Line 104 to 107 in docs/conf.py should be gone as well, as this is effectively the last artifact of #2078, right?

96f1547#diff-85933aa74a2d66c3e4dcdf7a9ad8397f5a7971080d34ef1108296a7c6b69e7e3R104-R107

Fixed

[neocturne]

Current Firefox ESR is 115.x, so we can finally merge this.