[DynInst_API:] [dyninst/dyninst] 57b65e: Remove char* ctor overload (#1605)

[Tim Haines <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: 57b65e98402f3741c87908f62b965101d9ad974c
      https://github.com/dyninst/dyninst/commit/57b65e98402f3741c87908f62b965101d9ad974c
  Author: Tim Haines <thaines.astro@xxxxxxxxx>
  Date:   2023-10-30 (Mon, 30 Oct 2023)

  Changed paths:
    M common/h/registers/MachRegister.h
    M common/src/registers/MachRegister.C

  Log Message:
  -----------
  Remove char* ctor overload (#1605)

It makes no sense to have this and the std::string version when they do
the same thing.