Reverse logic of context tracking enablement from #1927 (#1971)

In this commit it disabled by default and can be enabled via
`RCCL_ENABLE_CONTEXT_TRACKING=1` for both (CDNA, RDNA)
Original PR https://github.com/ROCm/rccl/pull/1927

src/include/utils.h

@@ -68,8 +68,6 @@ inline ncclResult_t getRandomData(void* buffer, size_t bytes) {
   return ret;
 }
 
-bool rcclNeedEnableContextTrack(int cuDeviceId);
-
 ////////////////////////////////////////////////////////////////////////////////
 
 template<typename Int>