Fixed ineffectual assignments

[muesli]

Don't assign values we never use.

[codecov-io]

Codecov Report

Merging #7555 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #7555      +/-   ##
==========================================
+ Coverage   41.24%   41.25%   +<.01%     
==========================================
  Files         469      469              
  Lines       63617    63616       -1     
==========================================
+ Hits        26239    26243       +4     
+ Misses      33955    33951       -4     
+ Partials     3423     3422       -1

Impacted Files	Coverage Δ
routers/user/setting/security_twofa.go	15.58% <ø> (-0.55%)	⬇️
models/git_diff.go	68.34% <100%> (ø)	⬆️
models/repo_list.go	72.08% <0%> (-1.02%)	⬇️
routers/repo/view.go	43.25% <0%> (+1.01%)	⬆️
modules/process/manager.go	81.15% <0%> (+4.34%)	⬆️

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