Try to re-enable previously disabled CPU test (#9085)

Author: tengyifei

test/test_python_ops.py

@@ -27,10 +27,6 @@ def test_put(self, dtype):
     if dtype in self.unsupported_dtypes:
       raise unittest.SkipTest("Dtype {0} is unsupported by XLA".format(
           str(dtype)))
-    if dtype == torch.uint8:
-      raise unittest.SkipTest(
-          'TODO(https://github.com/pytorch/xla/issues/8799): Re-enable uint8 test'
-      )
 
     device = xm.xla_device()
     real_device_type = xm.xla_device_hw(str(xm.xla_device()))