Clean up data headers

src/pokemon_storage_system.c

@@ -1,7 +1,7 @@
 #include "global.h"
 #include "alloc.h"
 #include "bg.h"
-#include "data2.h"
+#include "data.h"
 #include "decompress.h"
 #include "dma3.h"
 #include "dynamic_placeholder_text_util.h"
@@ -463,8 +463,6 @@ EWRAM_DATA static u8 sMovingMonOrigBoxId = 0;
 EWRAM_DATA static u8 sMovingMonOrigBoxPos = 0;
 EWRAM_DATA static bool8 sCanOnlyMove = 0;
 
-extern const struct CompressedSpriteSheet gMonFrontPicTable[];
-
 // This file's functions.
 static void CreatePCMenu(u8 whichMenu, s16 *windowIdPtr);
 static void Cb2_EnterPSS(u8 boxOption);