SWDEV-241896 - Remove extern support in ROCclr/HIP since compiler added Texture Reference support.

Change-Id: I2cf27e13a53860fe11e9245c9cbdcb8bd88a7872

rocclr/device/pal/palprogram.cpp

@@ -253,10 +253,6 @@ bool HSAILProgram::setKernels(amd::option::Options* options, void* binary, size_
   hsa_code_object_t code_object;
   code_object.handle = reinterpret_cast<uint64_t>(binary);
 
-  if (amd::IS_HIP) {
-    defineUndefinedVars();
-  }
-
   hsa_status_t status = executable_->LoadCodeObject(agent, code_object, nullptr);
   if (status != HSA_STATUS_SUCCESS) {
     buildLog_ += "Error: AMD HSA Code Object loading failed.\n";
@@ -751,10 +747,6 @@ bool LightningProgram::setKernels(amd::option::Options* options, void* binary, s
   hsa_code_object_t code_object;
   code_object.handle = reinterpret_cast<uint64_t>(binary);
 
-  if (amd::IS_HIP) {
-    defineUndefinedVars();
-  }
-
   hsa_status_t status = executable_->LoadCodeObject(agent, code_object, nullptr);
   if (status != HSA_STATUS_SUCCESS) {
     buildLog_ += "Error: AMD HSA Code Object loading failed.\n";