Clean up some additional unknowns

src/item.c

@@ -15,20 +15,14 @@
 #include "constants/items.h"
 #include "constants/hold_effects.h"
 
-extern u16 gUnknown_0203CF30[];
-
-// this file's functions
 static bool8 CheckPyramidBagHasItem(u16 itemId, u16 count);
 static bool8 CheckPyramidBagHasSpace(u16 itemId, u16 count);
 
-// EWRAM variables
 EWRAM_DATA struct BagPocket gBagPockets[POCKETS_COUNT] = {0};
 
-// rodata
 #include "data/text/item_descriptions.h"
 #include "data/items.h"
 
-// code
 static u16 GetBagItemQuantity(u16 *quantity)
 {
     return gSaveBlock2Ptr->encryptionKey ^ *quantity;