[WJ-1074] Remove [[css]] alias

[emmiegit]

It was a dumb thing to add in the first place, and since it doesn't already exist in Wikidot we can safely remove it without any issue.

[codecov]

Codecov Report

Merging #1178 (2f5fbea) into develop (f907fac) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1178      +/-   ##
===========================================
- Coverage    36.55%   36.51%   -0.04%     
===========================================
  Files          432      431       -1     
  Lines        22207    22198       -9     
  Branches       193      193              
===========================================
- Hits          8117     8106      -11     
- Misses       14087    14089       +2     
  Partials         3        3              

Flag	Coverage Δ		*Carryforward flag
deepwell	7.54% <ø> (ø)		Carriedforward from f907fac
ftml	80.42% <ø> (-0.06%)	⬇️
web	20.08% <ø> (ø)		Carriedforward from f907fac

*This pull request uses carry forward flags. Click here to find out more.

Impacted Files	Coverage Δ
ftml/src/parsing/rule/impls/block/blocks/mod.rs	100.00% <ø> (ø)
ftml/src/parsing/rule/impls/block/mapping.rs	100.00% <ø> (ø)
ftml/src/lib.rs	12.50% <0.00%> (-25.00%)	⬇️

[emmiegit]

thanks @Yossipossi1