Fix a bunch of compiler warnings

src/core/namco_guncon.cpp

@@ -1,6 +1,5 @@
 #include "namco_guncon.h"
 #include "common/assert.h"
-#include "common/log.h"
 #include "common/state_wrapper.h"
 #include "gpu.h"
 #include "host_display.h"
@@ -8,7 +7,6 @@
 #include "resources.h"
 #include "system.h"
 #include <array>
-Log_SetChannel(NamcoGunCon);
 
 NamcoGunCon::NamcoGunCon(System* system) : m_system(system) {}