Fix ball resetting when hatching an Egg

src/egg_hatch.c

@@ -378,9 +378,6 @@ static void AddHatchedMonToParty(u8 id)
 
     GetMonNickname2(mon, gStringVar1);
 
-    ball = ITEM_POKE_BALL;
-    SetMonData(mon, MON_DATA_POKEBALL, &ball);
-
     // A met level of 0 is interpreted on the summary screen as "hatched at"
     metLevel = 0;
     SetMonData(mon, MON_DATA_MET_LEVEL, &metLevel);