remove gitlab.use-group-id

[qw1mb0]

fixes: #226

[codecov-io]

Codecov Report

Merging #227 into master will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #227      +/-   ##
==========================================
+ Coverage   34.43%   34.48%   +0.04%     
==========================================
  Files          26       26              
  Lines        1397     1395       -2     
==========================================
  Hits          481      481              
+ Misses        883      881       -2     
  Partials       33       33

Impacted Files	Coverage Δ
auth/providers/gitlab/options.go	0% <ø> (ø)	⬆️

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[nightfury1204]

@qw1mb0 we can not remove this option. see: #181