SWDEV-385161 - Deprecate usage of env vars in HIP samples and tests (#363)

* SWDEV-385161 - Deprecate usage of env vars in HIP samples and tests env vars such as HIP_PATH, ROCM_PATH, HIP_COMPILER, HIP_RUNTIME, HSA_PATH etc are removed.

Change-Id: I280e20b291cfb14675846aae72d97fa5b3ad567d

[ROCm/hip-tests commit: 34976df246]

projects/hip-tests/catch/unit/texture/hipTextureObjFetchVector.cc

@@ -21,7 +21,7 @@ THE SOFTWARE.
 #include <hip_array_common.hh>
 #include <vector>
 #include <iostream>
-
+#pragma clang diagnostic ignored "-Wunused-variable"
 template <typename T>
 __global__ void tex1dKernelFetch(T *val, hipTextureObject_t obj, int N) {
 #if !defined(__HIP_NO_IMAGE_SUPPORT) || !__HIP_NO_IMAGE_SUPPORT
@@ -79,7 +79,7 @@ bool runTest() {
   // Allocating the required buffer on gpu device
   T *texBuf, *texBufOut;
   T val[N], output[N];
-  hipGetLastError(); // Clear err due to negative tests
+  auto err = hipGetLastError(); // Clear err due to negative tests
   memset(output, 0, sizeof(output));
   std::srand(std::time(nullptr)); // use current time as seed for random generator