[DynInst_API:] [dyninst/dyninst] 40c64d: Remove Pair.h and pdpair (#1593)

[Tim Haines <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: 40c64db3f3f30ebfae6c4a484c60c36d81ff0cfb
      https://github.com/dyninst/dyninst/commit/40c64db3f3f30ebfae6c4a484c60c36d81ff0cfb
  Author: Tim Haines <thaines.astro@xxxxxxxxx>
  Date:   2023-10-26 (Thu, 26 Oct 2023)

  Changed paths:
    M common/CMakeLists.txt
    R common/src/Pair.h
    M dyninstAPI/src/BPatch.C
    M dyninstAPI/src/BPatch_flowGraph.C
    M dyninstAPI/src/debug.C
    M dyninstAPI/src/debug.h
    M dyninstAPI/src/function.h
    M dyninstAPI/src/parRegion.h
    M dyninstAPI/src/parse-cfg.h

  Log Message:
  -----------
  Remove Pair.h and pdpair (#1593)

It's no longer used.