update mixed mm weight only quant test to work w mixed mm deletion (#1772)

We're deleting mixed_mm path in pytorch/pytorch#147151. update test to not check for mixed_mm kernel.
Pull Request resolved: #1772
Approved by: https://github.com/drisspg

Author: eellison

test/integration/test_integration.py

@@ -1243,8 +1243,6 @@ def test_weight_only_quant_force_mixed_mm(self, device, dtype):
                 y_wo, (code,) = run_and_get_code(m_c, x)
                 sqnr = compute_error(y_ref, y_wo)
                 self.assertGreaterEqual(sqnr, 38)
-                if device == "cuda":
-                    self.assertTrue("mixed_mm" in code, f"got code: {code}")
 
     @parameterized.expand(COMMON_DEVICE_DTYPE)
     @unittest.skipIf(not torch.cuda.is_available(), "Need CUDA available")