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

catch/unit/graph/hipGraphCycle.cc

@@ -132,7 +132,6 @@ TEST_CASE("Unit_hipGraph_BasicCyclic4") {
 
   HipTest::initArrays<int>(&X_d, &Y_d, nullptr, &X_h, &Y_h, nullptr, N, false);
 
-  constexpr size_t memSetVal = 9;
   hipGraphNode_t kMemCpyH2D_X, memcpyD2D, memcpyD2H_RC, emptyNode1;
 
   HIP_CHECK(hipStreamCreate(&stream));
@@ -192,7 +191,6 @@ TEST_CASE("Unit_hipGraph_BasicCyclic5") {
 
   HipTest::initArrays<int>(&X_d, &Y_d, nullptr, &X_h, &Y_h, nullptr, N, false);
 
-  constexpr size_t memSetVal = 9;
   hipGraphNode_t kMemCpyH2D_X, memcpyD2D, memcpyD2H_RC, emptyNode1, emptyNode2, emptyNode3;
 
   HIP_CHECK(hipStreamCreate(&stream));
@@ -241,4 +239,4 @@ TEST_CASE("Unit_hipGraph_BasicCyclic5") {
   HIP_CHECK(hipGraphExecDestroy(graphExec));
   HIP_CHECK(hipGraphDestroy(graph));
   HIP_CHECK(hipStreamDestroy(stream));
-}
+}