input_common: Reduce unused includes

src/input_common/drivers/gc_adapter.h

@@ -6,7 +6,6 @@
 
 #include <array>
 #include <memory>
-#include <mutex>
 #include <stop_token>
 #include <string>
 #include <thread>

src/input_common/helpers/udp_protocol.h

@@ -10,7 +10,6 @@
 
 #include <boost/crc.hpp>
 
-#include "common/bit_field.h"
 #include "common/swap.h"
 
 namespace InputCommon::CemuhookUDP {

src/input_common/input_engine.cpp

@@ -3,7 +3,6 @@
 // Refer to the license.txt file included
 
 #include "common/logging/log.h"
-#include "common/param_package.h"
 #include "input_common/input_engine.h"
 
 namespace InputCommon {

src/input_common/main.cpp

@@ -3,7 +3,6 @@
 // Refer to the license.txt file included.
 
 #include <memory>
-#include <thread>
 #include "common/input.h"
 #include "common/param_package.h"
 #include "input_common/drivers/gc_adapter.h"