Remove duplicated vote if detected

[themantre]

• Remove the duplicated vote if detected

[codecov]

Codecov Report

Merging #74 (1138d6a) into main (e099cfa) will increase coverage by 0.01%.
The diff coverage is 93.75%.

@@            Coverage Diff             @@
##             main      #74      +/-   ##
==========================================
+ Coverage   82.67%   82.68%   +0.01%     
==========================================
  Files          89       89              
  Lines        4346     4349       +3     
==========================================
+ Hits         3593     3596       +3     
  Misses        508      508              
  Partials      245      245              

Impacted Files	Coverage Δ
vote/vote_set.go	90.32% <93.75%> (+0.32%)	⬆️

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