HIPCommander code cleanup (#1207)

* HIPCommander code cleanup

* Removed non-used headerfiles

* Removed empty ifdef


[ROCm/hip-tests commit: 53aeee42f9]

projects/hip-tests/samples/1_Utils/hipCommander/loop2.hcm

@@ -1,2 +1,2 @@
-setstream,1;
-loop,1000; NullKernel; syncstream; endloop,1,
+setstream(1);
+loop(1000); NullKernel; streamsync; endloop(1);