common: remove non-Linux support from all build paths

[grom72]

Remove files and compilation options irrelevant to supported compilation options.

Fixes: #5715

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This change is 

[osalyk]

Reviewed 6 of 12 files at r1, 6 of 6 files at r2, all commit messages.
Reviewable status: 12 of 13 files reviewed, all discussions resolved (waiting on @janekmi)

[osalyk]

Please rebase.

[grom72]

Done

Reviewable status: 6 of 13 files reviewed, all discussions resolved (waiting on @janekmi and @osalyk)

[grom72]

Reviewed 6 of 12 files at r1, 1 of 7 files at r3, 6 of 6 files at r4, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @janekmi)

[osalyk]

Reviewed 1 of 7 files at r3, 6 of 6 files at r4, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @janekmi)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.12%. Comparing base (457c61d) to head (d34357a).
Report is 17 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5941      +/-   ##
==========================================
- Coverage   70.14%   70.12%   -0.02%     
==========================================
  Files         133      133              
  Lines       19568    19568              
  Branches     3261     3261              
==========================================
- Hits        13726    13723       -3     
- Misses       5842     5845       +3     

[grom72]

Reviewed 1 of 1 files at r5, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @janekmi)

[janekmi]

Reviewed 1 of 12 files at r1, all commit messages.
Reviewable status: 5 of 13 files reviewed, 1 unresolved discussion (waiting on @grom72 and @osalyk)

a discussion (no related file):
I contacted our customers just to make sure they won't be affected by this change.

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[janekmi]

Reviewable status: 5 of 13 files reviewed, all discussions resolved (waiting on @grom72 and @osalyk)

a discussion (no related file):

Previously, janekmi (Jan Michalski) wrote…

I contacted our customers just to make sure they won't be affected by this change.

It is confirmed this change won't be a problem for our customers.

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[janekmi]

Reviewed 5 of 12 files at r1, 2 of 8 files at r6, 6 of 6 files at r7, 6 of 6 files at r9, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @grom72)

[osalyk]

Reviewed 2 of 8 files at r6, 6 of 6 files at r9, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @grom72)