2820f91c90
Remove __HCC__, __HCC_ONLY__, __HCC_CPP__, __HCC_C__,
__HCC_OR_HIP_CLANG__, __HIP_ROCclr__ and their guarded codes.
Remove Hcc codes from directed_tests and samples.
Remove __HIP_PLATFORM_HCC__ and __HIP_PLATFORM_NVCC__ from
some files where they are not necessary.
Add deprecation notice.
Change-Id: I1ae467eafd749d6c25bca204c1724b026be21fce
[ROCm/hip commit: b34dd95124]