Update dependencies for pytorch sagemaker container. (#267)

Author: nadiaya

src/sagemaker/pytorch/README.rst

@@ -671,9 +671,7 @@ The PyTorch Docker images have the following dependencies installed:
 +-----------------------------+---------------+
 | botocore                    | 1.10.35       |
 +-----------------------------+---------------+
-| numpy                       | 1.14.4        |
-+-----------------------------+---------------+
-| opencv-python               | 3.4.0.12      |
+| numpy                       | 1.14.3        |
 +-----------------------------+---------------+
 | Pillow                      | 5.1.0         |
 +-----------------------------+---------------+
@@ -685,7 +683,7 @@ The PyTorch Docker images have the following dependencies installed:
 +-----------------------------+---------------+
 | s3transfer                  | 0.1.13        |
 +-----------------------------+---------------+
-| sagemaker-containers        | 2.0.3         |
+| sagemaker-containers        | 2.0.4         |
 +-----------------------------+---------------+
 | sagemaker-pytorch-container | 1.0           |
 +-----------------------------+---------------+