Removes now-unnecessary obj_integrity definitions

code/game/objects/items/weapons/storage/backpack.dm

@@ -20,7 +20,6 @@
 	max_combined_w_class = 21
 	storage_slots = 21
 	resistance_flags = 0
-	obj_integrity = 300
 	max_integrity = 300
 
 /*

code/game/objects/items/weapons/storage/belt.dm

@@ -6,7 +6,6 @@
 	item_state = "utility"
 	slot_flags = SLOT_BELT
 	attack_verb = list("whipped", "lashed", "disciplined")
-	obj_integrity = 300
 	max_integrity = 300
 
 /obj/item/weapon/storage/belt/update_icon()

code/game/objects/items/weapons/storage/briefcase.dm

@@ -12,7 +12,6 @@
 	max_combined_w_class = 21
 	attack_verb = list("bashed", "battered", "bludgeoned", "thrashed", "whacked")
 	resistance_flags = FLAMMABLE
-	obj_integrity = 150
 	max_integrity = 150
 	var/folder_path = /obj/item/weapon/folder //this is the path of the folder that gets spawned in New()
 
@@ -43,7 +42,6 @@
 	max_combined_w_class = 21
 	attack_verb = list("bashed", "battered", "bludgeoned", "thrashed", "whacked")
 	resistance_flags = FLAMMABLE
-	obj_integrity = 150
 	max_integrity = 150
 
 /obj/item/weapon/storage/briefcase/sniperbundle/PopulateContents()