Fixes prosthetic quirk dropping organs underneath you when spawning (t…

…gstation#86533)

## About The Pull Request
Closes tgstation#86524
Insert does not return a value, ran a regex and nothing else seems to
have had this mistake

## Changelog
:cl:
fix: Fixed prosthetic quirk dropping organs underneath you when spawning
/:cl:

code/datums/quirks/negative_quirks/prosthetic_organ.dm

@@ -60,9 +60,9 @@
 	medical_record_text = "During physical examination, patient was found to have a low-budget prosthetic [slot_string]. \
 		Removal of these organs is known to be dangerous to the patient as well as the practitioner."
 	old_organ = human_holder.get_organ_slot(organ_slot)
-	if(prosthetic.Insert(human_holder, special = TRUE))
-		old_organ.moveToNullspace()
-		STOP_PROCESSING(SSobj, old_organ)
+	prosthetic.Insert(human_holder, special = TRUE)
+	old_organ.moveToNullspace()
+	STOP_PROCESSING(SSobj, old_organ)
 
 /datum/quirk/prosthetic_organ/post_add()
 	to_chat(quirk_holder, span_boldannounce("Your [slot_string] has been replaced with a surplus organ. It is weak and highly unstable. \