Codechange: Remove unnecessary 'core' includes. (#14867)

src/spriteloader/grf.cpp

@@ -13,9 +13,6 @@
 #include "../settings_type.h"
 #include "../strings_func.h"
 #include "../error.h"
-#include "../core/math_func.hpp"
-#include "../core/alloc_type.hpp"
-#include "../core/bitmath_func.hpp"
 #include "../spritecache.h"
 #include "grf.hpp"
 

src/spriteloader/makeindexed.cpp

@@ -8,7 +8,6 @@
 /** @file makeindexed.cpp Implementation for converting sprites from another source from 32bpp RGBA to indexed 8bpp. */
 
 #include "../stdafx.h"
-#include "../core/bitmath_func.hpp"
 #include "../core/math_func.hpp"
 #include "../gfx_func.h"
 #include "../palette_func.h"