ci: remove unnecessary "Remove unused applications" for build-sentry-native

[jpnurmi]

Unnecessarily slows down sentry-native builds by a few minutes, even when it ends up using a cached build. We could skip this when cache-hit == true, but freeing up disk space by removing unused apps is unnecessary for small and quick sentry-native builds, to begin with.

#skip-changelog

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.44%. Comparing base (bc5c060) to head (d0781dd).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4570      +/-   ##
==========================================
- Coverage   73.45%   73.44%   -0.02%     
==========================================
  Files         480      480              
  Lines       17589    17589              
  Branches     3469     3469              
==========================================
- Hits        12920    12918       -2     
- Misses       3785     3786       +1     
- Partials      884      885       +1     

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