Common: Remove thunk.h

This isn't used, and there's no implementations of the member functions.

src/common/CMakeLists.txt

@@ -52,7 +52,6 @@ set(HEADERS
             synchronized_wrapper.h
             thread.h
             thread_queue_list.h
-            thunk.h
             timer.h
             vector_math.h
             )

src/common/thunk.h

@@ -1,42 +0,0 @@
-// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <map>
-
-#include "common/common_types.h"
-
-// This simple class creates a wrapper around a C/C++ function that saves all fp state
-// before entering it, and restores it upon exit. This is required to be able to selectively
-// call functions from generated code, without inflicting the performance hit and increase
-// of complexity that it means to protect the generated code from this problem.
-
-// This process is called thunking.
-
-// There will only ever be one level of thunking on the stack, plus,
-// we don't want to pollute the stack, so we store away regs somewhere global.
-// NOT THREAD SAFE. This may only be used from the CPU thread.
-// Any other thread using this stuff will be FATAL.
-
-class ThunkManager : public Gen::XCodeBlock
-{
-    std::map<void *, const u8 *> thunks;
-
-    const u8 *save_regs;
-    const u8 *load_regs;
-
-public:
-    ThunkManager() {
-        Init();
-    }
-    ~ThunkManager() {
-        Shutdown();
-    }
-    void *ProtectFunction(void *function, int num_params);
-private:
-    void Init();
-    void Shutdown();
-    void Reset();
-};