undo pytorch default version change

Author: Chuyang Deng

README.rst

@@ -205,7 +205,7 @@ PyTorch SageMaker Estimators
 
 With PyTorch SageMaker Estimators, you can train and host PyTorch models on Amazon SageMaker.
 
-Supported versions of PyTorch: ``0.4.0``, ``1.0.0``.
+Supported versions of PyTorch: ``0.4.0``, ``1.0.0``, ``1.1.0``.
 
 We recommend that you use the latest supported version, because that's where we focus most of our development efforts.
 

src/sagemaker/pytorch/defaults.py

@@ -12,7 +12,7 @@
 # language governing permissions and limitations under the License.
 from __future__ import absolute_import
 
-PYTORCH_VERSION = '1.1.0'
+PYTORCH_VERSION = '0.4'
 """Default PyTorch version for when the framework version is not specified.
 This is no longer updated so as to not break existing workflows.
 """