Remove deprecated @mui/styles package

[cbeer]

I'm not seeing where we consume the provided styles, and it's a blocker to upgrading to React 18.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (10863f2) 92.53% compared to head (d0577aa) 92.50%.

❗ Current head d0577aa differs from pull request most recent head d23f628. Consider uploading reports for the commit d23f628 to get more accurate results

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             mui5    #3862      +/-   ##
==========================================
- Coverage   92.53%   92.50%   -0.04%     
==========================================
  Files         203      203              
  Lines        3576     3575       -1     
==========================================
- Hits         3309     3307       -2     
- Misses        267      268       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.