Remove Unused Functions

[6543]

each commit is one related remove ... so feel free to point to a specific commit hash to revert ...

It is a huge imprvement for the modules/structs package ;) since it should not contain any function ...

[6543]

-------------------------------------- space ----------------------------------------------

[sapk]

Removing code is the best change.
I am curious of how you discover thoses unused functions ?

[6543]

@sapk via golands "code inspection" and a lot of recusrive grep + time to look throu the code
ps: the code inspection suggested a lot more but I wasn't aggressiv with removing stuff (somebody may use this or that func in the future ...) but I found some nice things :D (#10513 was also based on this)

[sapk]

@6543 Ok, it looks good at first glance. For code part you hesitate we could use the Deprecated: syntax to highlight part that need to be cleaned later. But that already a good batch. Thanks for the time taken.

[codecov-io]

Codecov Report

Merging #10516 into master will decrease coverage by 0.04%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master   #10516      +/-   ##
==========================================
- Coverage   43.86%   43.82%   -0.05%     
==========================================
  Files         584      584              
  Lines       81649    81649              
==========================================
- Hits        35815    35782      -33     
- Misses      41399    41430      +31     
- Partials     4435     4437       +2

Impacted Files	Coverage Δ
routers/repo/webhook.go	1.27% <0%> (ø)	⬆️
models/repo_mirror.go	2.12% <0%> (-10.64%)	⬇️
services/pull/check.go	50% <0%> (-5.49%)	⬇️
modules/git/utils.go	65.67% <0%> (-4.48%)	⬇️
modules/git/command.go	86.95% <0%> (-2.61%)	⬇️
services/pull/patch.go	61.93% <0%> (-2.59%)	⬇️
services/pull/temp_repo.go	29.05% <0%> (-2.57%)	⬇️
modules/queue/unique_queue_disk_channel.go	53.84% <0%> (-1.93%)	⬇️
modules/queue/workerpool.go	56.93% <0%> (-1.07%)	⬇️
modules/git/repo.go	46.78% <0%> (-0.92%)	⬇️
... and 5 more

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