feat: OPTIC-1217: Revert "feat: OPTIC-1217: Implement Color design tokens as CSS variables and Dark Mode"

[yyassi-heartex]

This reverts commit 2e8e35e.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.40%. Comparing base (665f1b5) to head (3fd8289).
Report is 14 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7432   +/-   ##
========================================
  Coverage    78.40%   78.40%           
========================================
  Files          193      193           
  Lines        15624    15624           
========================================
  Hits         12250    12250           
  Misses        3374     3374           

Flag	Coverage Δ
pytests	78.40% <ø> (ø)

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