Merge pull request dotnet/coreclr#9603 from danmosemsft/defines4

Remove more dead native defines

Commit migrated from https://github.com/dotnet/coreclr/commit/a9b25d4aa22a1f4ad5f323f6c826e318f5a720fe

diff --cc src/coreclr/src/inc/jithelpers.h
Simple merge

diff --cc src/coreclr/src/vm/ecalllist.h
Simple merge

diff --cc src/coreclr/src/vm/prestub.cpp
Simple merge