diff --git a/erpnext/accounts/doctype/payment_request/payment_request.py b/erpnext/accounts/doctype/payment_request/payment_request.py
index c81df6f99c8..0411a311735 100644
--- a/erpnext/accounts/doctype/payment_request/payment_request.py
+++ b/erpnext/accounts/doctype/payment_request/payment_request.py
@@ -899,33 +899,6 @@ def validate_payment(doc, method=None):
 	)
 
 
-def get_paid_amount_against_order(dt, dn):
-	pe_ref = frappe.qb.DocType("Payment Entry Reference")
-	if dt == "Sales Order":
-		inv_dt, inv_field = "Sales Invoice Item", "sales_order"
-	else:
-		inv_dt, inv_field = "Purchase Invoice Item", "purchase_order"
-	inv_item = frappe.qb.DocType(inv_dt)
-	return (
-		frappe.qb.from_(pe_ref)
-		.select(
-			Sum(pe_ref.allocated_amount),
-		)
-		.where(
-			(pe_ref.docstatus == 1)
-			& (
-				(pe_ref.reference_name == dn)
-				| pe_ref.reference_name.isin(
-					frappe.qb.from_(inv_item)
-					.select(inv_item.parent)
-					.where(inv_item[inv_field] == dn)
-					.distinct()
-				)
-			)
-		)
-	).run()[0][0] or 0
-
-
 @frappe.whitelist()
 def get_open_payment_requests_query(doctype, txt, searchfield, start, page_len, filters):
 	# permission checks in `get_list()`