Reverts the second mob clean up because of incomplete implementation.

This caused an error that would then cause machinery to hang on the server, and was reproduced successfully.

code/modules/surgery/limb_reattach.dm

@@ -30,7 +30,7 @@
 		var/obj/item/organ/external/E = tool
 		user.visible_message("<span class='notice'>[user] has attached [target]'s [E.name] to the [E.amputation_point].</span>>",	\
 		"<span class='notice'>You have attached [target]'s [E.name] to the [E.amputation_point].</span>")
-		user.removeItem(E)
+		user.drop_from_inventory(E)
 		E.replaced(target)
 		E.loc = target
 		target.update_body()

code/modules/surgery/organs_internal.dm

@@ -278,7 +278,7 @@
 		"<span class='notice'>You have transplanted \the [tool] into [target]'s [affected.name].</span>")
 		var/obj/item/organ/O = tool
 		if(istype(O))
-			user.removeItem(O)
+			user.remove_from_mob(O)
 			O.replaced(target,affected)
 
 	fail_step(mob/living/user, mob/living/carbon/human/target, target_zone, obj/item/tool)

code/modules/surgery/robotics.dm

@@ -417,7 +417,8 @@
 		var/obj/item/device/mmi/M = tool
 		var/obj/item/organ/internal/mmi_holder/holder = new(target, 1)
 		target.internal_organs_by_name["brain"] = holder
-		user.removeItem(tool, holder)
+		user.drop_from_inventory(tool)
+		tool.loc = holder
 		holder.stored_mmi = tool
 		holder.update_from_mmi()