Revert "Add support for GC 11.5.0 and 11.5.1"

Reverting this as current mainline compiler branch does not support
gfx1150/gfx1151 yet. Will bring back later.

This reverts commit e877840197.

Change-Id: I31ff4fb2d5817538094a7ffaeba96dd6a7d660c7

runtime/hsa-runtime/image/blit_kernel.cpp

@@ -103,8 +103,6 @@ extern uint8_t ocl_blit_object_gfx1100[];
 extern uint8_t ocl_blit_object_gfx1101[];
 extern uint8_t ocl_blit_object_gfx1102[];
 extern uint8_t ocl_blit_object_gfx1103[];
-extern uint8_t ocl_blit_object_gfx1150[];
-extern uint8_t ocl_blit_object_gfx1151[];
 
 // Arguments inserted by OCL compiler, all zero here.
 struct OCLHiddenArgs {
@@ -1048,10 +1046,6 @@ hsa_status_t BlitKernel::GetPatchedBlitObject(const char* agent_name,
     *blit_code_object = ocl_blit_object_gfx1102;
   } else if (sname == "gfx1103") {
     *blit_code_object = ocl_blit_object_gfx1103;
-  } else if (sname == "gfx1150") {
-    *blit_code_object = ocl_blit_object_gfx1150;
-  } else if (sname == "gfx1151") {
-    *blit_code_object = ocl_blit_object_gfx1151;
   } else {
     return HSA_STATUS_ERROR_INVALID_ISA_NAME;
   }