Core: Remove unnecessary includes

Also moves a cpp file's related header file to the top of the inclusions if it isn't already there.

Source/Core/Core/ConfigLoaders/GameConfigLoader.cpp

@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include "Core/ConfigLoaders/GameConfigLoader.h"
+
 #include <algorithm>
 #include <array>
 #include <list>
@@ -22,7 +24,6 @@
 
 #include "Core/Config/Config.h"
 #include "Core/Config/GraphicsSettings.h"
-#include "Core/ConfigLoaders/GameConfigLoader.h"
 #include "Core/ConfigLoaders/IsSettingSaveable.h"
 
 namespace ConfigLoaders