Remove function localization (#225)

This PR removes function localization. These were capabilities that were
initially added during prototyping and were ultimately not expanded on.
They are currently just adding compilation time and in the future, if
these capabilities are required will likely be implemented differently.

Author: taalexander

releasenotes/notes/remove-function-localization-d5caa312fcabb7b3.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Remove function localization pass as this is not being used for any
+    compilation features as was initially planned.

targets/systems/mock/CMakeLists.txt

@@ -39,7 +39,6 @@ qssc_add_plugin(QSSCTargetMock QSSC_TARGET_PLUGIN
 Conversion/QUIRToStandard/QUIRToStandard.cpp
 MockTarget.cpp
 MockUtils.cpp
-Transforms/FunctionLocalization.cpp
 Transforms/QubitLocalization.cpp
 
 ADDITIONAL_HEADER_DIRS

targets/systems/mock/MockTarget.cpp

@@ -27,7 +27,6 @@
 #include "HAL/TargetSystem.h"
 #include "HAL/TargetSystemRegistry.h"
 #include "Payload/Payload.h"
-#include "Transforms/FunctionLocalization.h"
 #include "Transforms/QubitLocalization.h"
 
 #include "mlir/Dialect/LLVMIR/Transforms/LegalizeForExport.h"
@@ -184,7 +183,6 @@ MockSystem::MockSystem(std::unique_ptr<MockConfig> config)
 } // MockSystem
 
 llvm::Error MockSystem::registerTargetPasses() {
-  mlir::PassRegistration<MockFunctionLocalizationPass>();
   mlir::PassRegistration<MockQubitLocalizationPass>();
   mlir::PassRegistration<conversion::MockQUIRToStdPass>(
       []() -> std::unique_ptr<conversion::MockQUIRToStdPass> {
@@ -203,9 +201,7 @@ void mockPipelineBuilder(mlir::OpPassManager &pm) {
   pm.addPass(std::make_unique<mlir::quir::RemoveQubitOperandsPass>());
   pm.addPass(std::make_unique<mlir::quir::ClassicalOnlyDetectionPass>());
   pm.addPass(std::make_unique<MockQubitLocalizationPass>());
-  pm.addPass(std::make_unique<SymbolTableBuildPass>());
   OpPassManager &nestedModulePM = pm.nest<ModuleOp>();
-  nestedModulePM.addPass(std::make_unique<MockFunctionLocalizationPass>());
   nestedModulePM.addPass(
       std::make_unique<mlir::quir::FunctionArgumentSpecializationPass>());
 } // mockPipelineBuilder