Remove caching from CI

[notgull]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 40.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.47%. Comparing base (901520c) to head (4ad280b).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
src/sources/mod.rs	50.00%	2 Missing ⚠️
src/sources/generic.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #239      +/-   ##
==========================================
+ Coverage   85.19%   85.47%   +0.28%     
==========================================
  Files          14       14              
  Lines        1831     1825       -6     
==========================================
  Hits         1560     1560              
+ Misses        271      265       -6     

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