Revert "SWDEV-316819 - adding graph checks"

This reverts commit 5dd91d698b.

Reason for revert: Catch2 test fails

Change-Id: If0ea0eab16b50f27c9acbc471530266917773ff1

hipamd/src/hip_graph.cpp

@@ -1215,9 +1215,7 @@ hipError_t hipGraphChildGraphNodeGetGraph(hipGraphNode_t node, hipGraph_t* pGrap
     HIP_RETURN(hipErrorInvalidValue);
   }
   *pGraph = reinterpret_cast<hipChildGraphNode*>(node)->GetChildGraph();
-
-  //if the node count is larger than 0, the current node is a parent
-  if (*pGraph == nullptr || reinterpret_cast<ihipGraph*>(pGraph)->GetNodeCount() > 0) {
+  if (pGraph == nullptr) {
     HIP_RETURN(hipErrorInvalidValue);
   }
   HIP_RETURN(hipSuccess);