remove item expansion check

include/constants/battle_config.h

@@ -195,6 +195,7 @@
 #define B_HP_BERRIES                GEN_7 // In Gen4+, berries which restore hp activate immediately after HP drops to half. In Gen3, the effect occurs at the end of the turn.
 #define B_BERRIES_INSTANT           GEN_7 // In Gen4+, most berries activate on battle start/switch-in if applicable. In Gen3, they only activate either at the move end or turn end.
 #define B_CONFUSE_BERRIES_HEAL      GEN_8 // Before Gen7, Figy and similar berries restore 1/8th of HP and trigger at half HP. In Gen7 they restore half HP, triggering at 25% HP. In Gen8 they heal 1/3rd of HP.
+                                          // Requires using Item Expansion or manually editing the holdEffectParam of Figy, Wiki, Mago, Aguav and Iapapa berries.
 #define B_X_ITEMS_BUFF              GEN_7 // In Gen7+, the X Items raise a stat by 2 stages instead of 1.
 #define B_MENTAL_HERB               GEN_5 // In Gen5+, the Mental Herb cures Infatuation, Taunt, Encore, Torment, Heal Block, and Disable
 #define B_TRAINERS_KNOCK_OFF_ITEMS  TRUE  // If TRUE, trainers can steal/swap your items (non-berries are restored after battle). In vanilla games trainers cannot steal items.

src/battle_util.c

@@ -6098,7 +6098,7 @@ bool32 HasEnoughHpToEatBerry(u32 battlerId, u32 hpFraction, u32 itemId)
     return FALSE;
 }
 
-#if defined(ITEM_EXPANSION) && B_CONFUSE_BERRIES_HEAL >= GEN_7
+#if B_CONFUSE_BERRIES_HEAL >= GEN_7
     #define CONFUSE_BERRY_HP_FRACTION 4
 #else
     #define CONFUSE_BERRY_HP_FRACTION 2