arm_dynarmic: More cleanup.

src/core/arm/dynarmic/arm_dynarmic.h

@@ -4,15 +4,9 @@
 
 #pragma once
 
-#include <map>
-#include <memory>
 #include "common/common_types.h"
 #include "core/arm/arm_interface.h"
 
-namespace Memory {
-struct PageTable;
-} // namespace Memory
-
 class ARM_Dynarmic final : public ARM_Interface {
 public:
     ARM_Dynarmic();