PassManager: Remove SyscallHandler member

This isn't used anymore, so we can get rid of it to further simplify
initialization.

FEXCore/Source/Interface/Core/Core.cpp

@@ -404,8 +404,6 @@ void ContextImpl::InitializeCompiler(FEXCore::Core::InternalThreadState* Thread)
 
   Dispatcher->InitThreadPointers(Thread);
 
-  Thread->PassManager->RegisterSyscallHandler(SyscallHandler);
-
   // Create CPU backend
   Thread->CPUBackend = FEXCore::CPU::CreateArm64JITCore(this, Thread);
 

FEXCore/Source/Interface/IR/PassManager.h

@@ -8,23 +8,17 @@ $end_info$
 #pragma once
 
 #include <FEXCore/Config/Config.h>
-#include <FEXCore/Utils/ThreadPoolAllocator.h>
 #include <FEXCore/fextl/memory.h>
 #include <FEXCore/fextl/string.h>
 #include <FEXCore/fextl/unordered_map.h>
 #include <FEXCore/fextl/vector.h>
 
-#include <functional>
 #include <utility>
 
 namespace FEXCore::Context {
 class ContextImpl;
 }
 
-namespace FEXCore::HLE {
-class SyscallHandler;
-}
-
 namespace FEXCore::IR {
 class PassManager;
 class IREmitter;
@@ -65,15 +59,8 @@ public:
     return NameToPassMaping[Name];
   }
 
-  void RegisterSyscallHandler(FEXCore::HLE::SyscallHandler* Handler) {
-    SyscallHandler = Handler;
-  }
-
   void Finalize();
 
-protected:
-  FEXCore::HLE::SyscallHandler* SyscallHandler {};
-
 private:
   void AddDefaultPasses(Context::ContextImpl* ctx);