Revert "Add CoreCLR branch dev/local-gc to CI (#663)" (#692)
Revert "Add CoreCLR branch dev/local-gc to CI (#663)" (#692)

This reverts commit bd42888661fed0dbf6ea83f6fe1400aca068ada2.
tannergooding/dotnet-ci,dotnet/dotnet-ci,dotnet/dotnet-ci,tannergooding/dotnet-ci,mmitche/dotnet-ci,mmitche/dotnet-ci