test: remove broken bom test

These variables never existed, the test was passing because of a bug in
timeout decorator https://github.com/frappe/frappe/pull/25491
diff --git a/erpnext/manufacturing/doctype/bom/test_bom.py b/erpnext/manufacturing/doctype/bom/test_bom.py
index 4cd0530..2debf91 100644
--- a/erpnext/manufacturing/doctype/bom/test_bom.py
+++ b/erpnext/manufacturing/doctype/bom/test_bom.py
@@ -28,28 +28,6 @@
 
 class TestBOM(FrappeTestCase):
 	@timeout
-	def test_bom_qty(self):
-		from erpnext.stock.doctype.item.test_item import make_item
-
-		# No error.
-		bom = frappe.new_doc("BOM")
-		item = make_item(properties={"is_stock_item": 1})
-		bom.item = fg_item.item_code
-		bom.quantity = 1
-		bom.append(
-			"items",
-			{
-				"item_code": bom_item.item_code,
-				"qty": 0,
-				"uom": bom_item.stock_uom,
-				"stock_uom": bom_item.stock_uom,
-				"rate": 100.0,
-			},
-		)
-		bom.save()
-		self.assertEqual(bom.items[0].qty, 0)
-
-	@timeout
 	def test_get_items(self):
 		from erpnext.manufacturing.doctype.bom.bom import get_bom_items_as_dict