fixes undroppable wrist blades (#7159)

# About the pull request
fixes #6640
adds trait DELONDROP to wristblades 
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# Explain why it's good for the game
# Testing Photographs and Procedure
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# Changelog
:cl:
fix: Pred wristblades now del on drop
/:cl:

code/modules/cm_preds/yaut_weapons.dm

@@ -60,7 +60,7 @@
 	w_class = SIZE_HUGE
 	edge = TRUE
 	sharp = IS_SHARP_ITEM_ACCURATE
-	flags_item = NOSHIELD|NODROP|ITEM_PREDATOR
+	flags_item = NOSHIELD|NODROP|DELONDROP|ITEM_PREDATOR
 	flags_equip_slot = NO_FLAGS
 	hitsound = 'sound/weapons/wristblades_hit.ogg'
 	attack_speed = 6