Base.Pair === Core.Compiler.Pair on 1.7

[ToucheSir]

Here's the corresponding PR: JuliaLang/julia#41659.
These methods were pirating the definitions on stable Julia and (among other things) causing precompilation to fail.

[Roger-luo]

Thanks!

[codecov]

Codecov Report

Merging #7 (0b68ccf) into master (96d2616) will decrease coverage by 0.80%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master       #7      +/-   ##
==========================================
- Coverage   85.43%   84.63%   -0.81%     
==========================================
  Files           9        9              
  Lines         515      488      -27     
==========================================
- Hits          440      413      -27     
  Misses         75       75              

Impacted Files	Coverage Δ
src/patches.jl	70.45% <ø> (ø)
src/ircode.jl	84.37% <0.00%> (-2.81%)	⬇️
src/interp.jl	65.21% <0.00%> (-1.45%)	⬇️
src/utils.jl	82.08% <0.00%> (-1.01%)	⬇️
src/passes.jl	80.74% <0.00%> (-0.69%)	⬇️
src/codeinfo.jl	93.93% <0.00%> (-0.35%)	⬇️

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