Remove moq generation step

[johanbrandhorst]

Fixes #125

[codecov]

Codecov Report

Merging #126 into master will decrease coverage by 0.24%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #126      +/-   ##
==========================================
- Coverage   64.99%   64.74%   -0.25%     
==========================================
  Files          10       10              
  Lines         537      539       +2     
==========================================
  Hits          349      349              
- Misses        123      124       +1     
- Partials       65       66       +1     

Impacted Files	Coverage Δ
issuers/vault/vault.go	60.25% <0.00%> (-1.59%)	⬇️

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