Core: Remove MemoryWatcher

MemoryWatcher only works on Linux and affects emulation determinism due
to scheduling additional events, which causes NetPlay to desync.
Considering that this interface is a rather specialized use case, the
communication with it is kinda crappy *and* it's affecting emulation, I
think it's best to just axe it and come up with a better implementation
of the functionality.

Source/Core/Core/MemoryWatcher.h

@@ -1,47 +0,0 @@
-// Copyright 2015 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <map>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <vector>
-
-// MemoryWatcher reads a file containing in-game memory addresses and outputs
-// changes to those memory addresses to a unix domain socket as the game runs.
-//
-// The input file is a newline-separated list of hex memory addresses, without
-// the "0x". To follow pointers, separate addresses with a space. For example,
-// "ABCD EF" will watch the address at (*0xABCD) + 0xEF.
-// The output to the socket is two lines. The first is the address from the
-// input file, and the second is the new value in hex.
-class MemoryWatcher final
-{
-public:
-  MemoryWatcher();
-  ~MemoryWatcher();
-  void Step();
-
-  static void Init();
-  static void Shutdown();
-
-private:
-  bool LoadAddresses(const std::string& path);
-  bool OpenSocket(const std::string& path);
-
-  void ParseLine(const std::string& line);
-  u32 ChasePointer(const std::string& line);
-  std::string ComposeMessage(const std::string& line, u32 value);
-
-  bool m_running;
-
-  int m_fd;
-  sockaddr_un m_addr;
-
-  // Address as stored in the file -> list of offsets to follow
-  std::map<std::string, std::vector<u32>> m_addresses;
-  // Address as stored in the file -> current value
-  std::map<std::string, u32> m_values;
-};