refactor: remove redundant batch qty validation

This check was only checking total sum, which is problamatic when making
backdated entries that can cause intermediate values to go negative
while overall values stay positive.

erpnext/stock/doctype/stock_ledger_entry/stock_ledger_entry.py

@@ -8,7 +8,7 @@ import frappe
 from frappe import _
 from frappe.core.doctype.role.role import get_users
 from frappe.model.document import Document
-from frappe.utils import add_days, cint, flt, formatdate, get_datetime, getdate
+from frappe.utils import add_days, cint, formatdate, get_datetime, getdate
 
 from erpnext.accounts.utils import get_fiscal_year
 from erpnext.controllers.item_variant import ItemTemplateCannotHaveStock
@@ -43,7 +43,6 @@ class StockLedgerEntry(Document):
 
 	def on_submit(self):
 		self.check_stock_frozen_date()
-		self.actual_amt_check()
 		self.calculate_batch_qty()
 
 		if not self.get("via_landed_cost_voucher"):
@@ -57,18 +56,6 @@ class StockLedgerEntry(Document):
 				"sum(actual_qty)") or 0
 			frappe.db.set_value("Batch", self.batch_no, "batch_qty", batch_qty)
 
-	def actual_amt_check(self):
-		"""Validate that qty at warehouse for selected batch is >=0"""
-		if self.batch_no and not self.get("allow_negative_stock"):
-			batch_bal_after_transaction = flt(frappe.db.sql("""select sum(actual_qty)
-				from `tabStock Ledger Entry`
-				where is_cancelled =0 and warehouse=%s and item_code=%s and batch_no=%s""",
-				(self.warehouse, self.item_code, self.batch_no))[0][0])
-
-			if batch_bal_after_transaction < 0:
-				frappe.throw(_("Stock balance in Batch {0} will become negative {1} for Item {2} at Warehouse {3}")
-					.format(self.batch_no, batch_bal_after_transaction, self.item_code, self.warehouse))
-
 	def validate_mandatory(self):
 		mandatory = ['warehouse','posting_date','voucher_type','voucher_no','company']
 		for k in mandatory: