fix(pos): cannot set qty to less than zero (#25258)

diff --git a/erpnext/selling/page/point_of_sale/pos_controller.js b/erpnext/selling/page/point_of_sale/pos_controller.js
index 9e3c9a5..8adf5bf 100644
--- a/erpnext/selling/page/point_of_sale/pos_controller.js
+++ b/erpnext/selling/page/point_of_sale/pos_controller.js
@@ -279,11 +279,6 @@
 					const item_row = frappe.model.get_doc(cdt, cdn);
 					if (item_row && item_row[fieldname] != value) {
 
-						if (fieldname === 'qty' && flt(value) == 0) {
-							this.remove_item_from_cart();
-							return;
-						}
-
 						const { item_code, batch_no, uom } = this.item_details.current_item;
 						const event = {
 							field: fieldname,