Retire our delegating Comparer

[atifaziz]

This PR removes Comparer in favour of Delegate.Comparer from Delegating that provides the same functionality.

[viceroypenguin]

Is there a reason not to use System.Collections.Generic.Comparer<T>.Create()? (available since net4.5 per https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.comparer-1.create?view=net-7.0)

[atifaziz]

Is there a reason not to use System.Collections.Generic.Comparer<T>.Create()?

None. It's what happens when you work late. 😉 Thanks for the review! Fixed with c3dfb19.

[codecov]

Codecov Report

Merging #921 (d625bcd) into master (34c7ebe) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #921   +/-   ##
=======================================
  Coverage   92.44%   92.44%           
=======================================
  Files         112      112           
  Lines        3440     3440           
  Branches     1018     1018           
=======================================
  Hits         3180     3180           
  Misses        199      199           
  Partials       61       61           

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