[test] removing xfail in test_ops.py

I've noticed some tests are now passing (with latest tt-mlir/tt-metal),
so removing `xfail` mark for those.

forge/test/mlir/test_ops.py

@@ -129,7 +129,6 @@ def get_input_tensor(dtype):
         (1, 7, 256),
     ],
 )
-@pytest.mark.xfail(reason="Found Unsupported operations while lowering from TTForge to TTIR in forward graph")
 @pytest.mark.push
 def test_sin(shape):
     class sin(nn.Module):
@@ -158,7 +157,6 @@ def forward(self, x):
         (1, 7, 256),
     ],
 )
-@pytest.mark.xfail(reason="Found Unsupported operations while lowering from TTForge to TTIR in forward graph")
 @pytest.mark.push
 def test_cosine(shape):
     class cosine(nn.Module):
@@ -1070,9 +1068,6 @@ def forward(self, x, y):
     assert compare_with_golden_pcc(golden=fw_out, calculated=co_out[0], pcc=0.99)
 
 
-@pytest.mark.xfail(
-    reason="Unable to reshape a tensor in TILE_LAYOUT to non-tile height and width! Please convert the tensor to ROW_MAJOR_LAYOUT first"
-)
 @pytest.mark.parametrize("x_shape", [7, 32, 41])
 @pytest.mark.parametrize("y_shape", [7, 32, 41])
 @pytest.mark.parametrize("dim", [1, 2])