docs(repo): remove unexist badge and action in readme

[trufflefan]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.77%. Comparing base (d6001d3) to head (c82326b).
Report is 304 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #17928       +/-   ##
===========================================
- Coverage   49.37%   24.77%   -24.60%     
===========================================
  Files          56      107       +51     
  Lines        5827     5299      -528     
===========================================
- Hits         2877     1313     -1564     
- Misses       2636     3839     +1203     
+ Partials      314      147      -167     

Flag	Coverage Δ
eventindexer	19.92% <ø> (?)
guardian-prover-health-check	35.16% <ø> (?)
relayer	26.83% <ø> (?)

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