Move throwforce up to atom/movable (#38689)

code/game/objects/obj_defense.dm

@@ -48,13 +48,7 @@
 
 /obj/hitby(atom/movable/AM)
 	..()
-	var/tforce = 0
-	if(ismob(AM))
-		tforce = 10
-	else if(isobj(AM))
-		var/obj/O = AM
-		tforce = O.throwforce
-	take_damage(tforce, BRUTE, "melee", 1, get_dir(src, AM))
+	take_damage(AM.throwforce, BRUTE, "melee", 1, get_dir(src, AM))
 
 /obj/ex_act(severity, target)
 	if(resistance_flags & INDESTRUCTIBLE)

code/game/objects/objs.dm

@@ -2,7 +2,6 @@
 /obj
 	var/crit_fail = FALSE
 	animate_movement = 2
-	var/throwforce = 0
 	var/obj_flags = CAN_BE_HIT
 	var/set_obj_flags // ONLY FOR MAPPING: Sets flags from a string list, handled in Initialize. Usage: set_obj_flags = "EMAGGED;!CAN_BE_HIT" to set EMAGGED and clear CAN_BE_HIT.