Remove (now) unnecessary gpu properties

etc/config/ada.gpu.properties

etc/config/assembly.gpu.properties

etc/config/c++.gpu.properties

etc/config/c.gpu.properties

etc/config/carbon.gpu.properties

etc/config/circle.gpu.properties

etc/config/cpp2_cppfront.gpu.properties

etc/config/cpp_for_opencl.gpu.properties

etc/config/csharp.gpu.properties

etc/config/fsharp.gpu.properties

etc/config/hlsl.gpu.properties

etc/config/hook.gpu.properties

etc/config/llvm.gpu.properties

etc/config/ocaml.gpu.properties

etc/config/openclc.gpu.properties

etc/config/python.gpu.properties

etc/config/typescript.gpu.properties

etc/config/vb.gpu.properties