Remove hip-hcc codes: Part four

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

hipamd/tests/src/kernel/hipLanguageExtensions.cpp

@@ -31,10 +31,6 @@ THE SOFTWARE.
 
 #include <test_common.h>
 
-#ifdef __HCC__
-#include <hc.hpp>
-#endif
-
 // cudaA
 
 // Simple tests for variable type qualifiers:
@@ -89,14 +85,6 @@ __global__ void vectorADD(T __restrict__* A_d, T* B_d, T* C_d, size_t N) {
     float fastZ = __sin(x);
 #endif
 
-#ifdef __HCC__
-
-    int b = threadIdx.x;
-    int c;
-
-    atomicAdd(&c, b);
-#endif
-
     __syncthreads();