Cleanup roctracer_hsa.h

Remove declarations that are not meant to be part of the public API.

Change-Id: I47d9e83bf41bdb2f7ac25a1507200b51c616049b

src/tracer_tool/tracer_tool.cpp

@@ -27,8 +27,9 @@
 #include <utility>
 #include <variant>
 
-#include <cxxabi.h> /* names denangle */
+#include <cxxabi.h> /* kernel name demangling */
 #include <dirent.h>
+#include <hsa/hsa_api_trace.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>