rocr: Remove unnecessary function declarations

Change-Id: Ia2613ce74cac808f9239fc24049b57b7b1abaed9


[ROCm/ROCR-Runtime commit: d6ec7b6489]

projects/rocr-runtime/runtime/hsa-runtime/hsacore.so.def

@@ -247,12 +247,6 @@ global:
 	hsa_amd_vmem_retain_alloc_handle;
 	hsa_amd_vmem_get_alloc_properties_from_handle;
 	hsa_amd_agent_set_async_scratch_limit;
-	hsa_tools_scratch_event_alloc_start;
-	hsa_tools_scratch_event_alloc_end;
-	hsa_tools_scratch_event_free_start;
-	hsa_tools_scratch_event_free_end;
-	hsa_tools_scratch_event_async_reclaim_start;
-	hsa_tools_scratch_event_async_reclaim_end;
 	hsa_ven_amd_pcs_iterate_configuration;
 	hsa_ven_amd_pcs_create;
 	hsa_ven_amd_pcs_create_from_id;