WiimoteEmu: Remove Spy method

This is the only use for a lot of unused methods and structs, and it's a
poorly written mess that doesn't even compile. Just remove it so we can
clean up the rest of a lot of code.

Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp

@@ -756,7 +756,6 @@ void Wiimote::Update()
 	// send data report
 	if (rptf_size)
 	{
-		WiimoteEmu::Spy(this, data, rptf_size);
 		Core::Callback_WiimoteInterruptChannel(m_index, m_reporting_channel, data, rptf_size);
 	}
 }

Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h

@@ -88,7 +88,6 @@ inline double trim(double a)
 class Wiimote : public ControllerEmu
 {
 friend class WiimoteReal::Wiimote;
-friend void Spy(Wiimote* wm_, const void* data_, size_t size_);
 public:
 
 	enum
@@ -234,6 +233,4 @@ private:
 #pragma pack(pop)
 };
 
-void Spy(Wiimote* wm_, const void* data_, size_t size_);
-
 }

Source/Core/Core/HW/WiimoteReal/IOWin.cpp

@@ -661,8 +661,6 @@ int _IORead(HANDLE &dev_handle, OVERLAPPED &hid_overlap_read, u8* buf, int index
 		}
 	}
 
-	WiimoteEmu::Spy(nullptr, buf, bytes + 1);
-
 	return bytes + 1;
 }
 
@@ -683,8 +681,6 @@ int Wiimote::IORead(u8* buf)
 
 int _IOWrite(HANDLE &dev_handle, OVERLAPPED &hid_overlap_write, enum win_bt_stack_t &stack, const u8* buf, size_t len, DWORD* written)
 {
-	WiimoteEmu::Spy(nullptr, buf, len);
-
 	switch (stack)
 	{
 		case MSBT_STACK_UNKNOWN: