Fix license text

Author: Payton Staub

tests/unit/sagemaker/workflow/test_callback_step.py

@@ -10,7 +10,6 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
-# language governing permissions and limitations under the License.
 from __future__ import absolute_import
 
 from sagemaker.workflow.parameters import ParameterInteger