refactor(test): remove assert on 'repost_required'

(cherry picked from commit e71cb4eab7)

erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py

@@ -2014,8 +2014,6 @@ class TestPurchaseInvoice(FrappeTestCase, StockTestMixin):
 			["Service - _TC", 1000, 0.0, nowdate()],
 		]
 		check_gl_entries(self, pi.name, expected_gle, nowdate())
-		pi.load_from_db()
-		self.assertFalse(pi.repost_required)
 
 	@change_settings("Buying Settings", {"supplier_group": None})
 	def test_purchase_invoice_without_supplier_group(self):

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -2952,9 +2952,6 @@ class TestSalesInvoice(FrappeTestCase):
 
 		check_gl_entries(self, si.name, expected_gle, add_days(nowdate(), -1))
 
-		si.load_from_db()
-		self.assertFalse(si.repost_required)
-
 	def test_asset_depreciation_on_sale_with_pro_rata(self):
 		"""
 		Tests if an Asset set to depreciate yearly on June 30, that gets sold on Sept 30, creates an additional depreciation entry on its date of sale.