fix: pos payment methods not setting rounded_total (#27260)

diff --git a/erpnext/selling/page/point_of_sale/pos_payment.js b/erpnext/selling/page/point_of_sale/pos_payment.js
index 63306ad..8e69851 100644
--- a/erpnext/selling/page/point_of_sale/pos_payment.js
+++ b/erpnext/selling/page/point_of_sale/pos_payment.js
@@ -253,41 +253,6 @@
 		}
 	}
 
-	setup_listener_for_payments() {
-		frappe.realtime.on("process_phone_payment", (data) => {
-			const doc = this.events.get_frm().doc;
-			const { response, amount, success, failure_message } = data;
-			let message, title;
-
-			if (success) {
-				title = __("Payment Received");
-				if (amount >= doc.grand_total) {
-					frappe.dom.unfreeze();
-					message = __("Payment of {0} received successfully.", [format_currency(amount, doc.currency, 0)]);
-					this.events.submit_invoice();
-					cur_frm.reload_doc();
-
-				} else {
-					message = __("Payment of {0} received successfully. Waiting for other requests to complete...", [format_currency(amount, doc.currency, 0)]);
-				}
-			} else if (failure_message) {
-				message = failure_message;
-				title = __("Payment Failed");
-			}
-
-			frappe.msgprint({ "message": message, "title": title });
-		});
-	}
-
-	auto_set_remaining_amount() {
-		const doc = this.events.get_frm().doc;
-		const remaining_amount = doc.grand_total - doc.paid_amount;
-		const current_value = this.selected_mode ? this.selected_mode.get_value() : undefined;
-		if (!current_value && remaining_amount > 0 && this.selected_mode) {
-			this.selected_mode.set_value(remaining_amount);
-		}
-	}
-
 	attach_shortcuts() {
 		const ctrl_label = frappe.utils.is_mac() ? '⌘' : 'Ctrl';
 		this.$component.find('.submit-order-btn').attr("title", `${ctrl_label}+Enter`);