Remove outdated steps from docs

Docker has fixed their IPv6 documentation to no longer need our
addendum.

The Bazel version requirement is outdated.

PiperOrigin-RevId: 339955828
Change-Id: I0e32f23467b226845686c1f5a21e19ee96ba98c6

INSTALL.md

@@ -108,21 +108,6 @@ sudo apt update
 sudo apt install bazel
 ```
 
-The Asylo toolchain requires Bazel's version to be at least `0.22`. You can
-check your installed Bazel by running `bazel version` and checking the output
-"Build label".
-
-Example output:
-
-```bash
-$ bazel version
-Build label: 0.22.0
-Build target: bazel-out/k8-opt/bin/src/main/java/com/google/devtools/build/lib/bazel/BazelServer_deploy.jar
-Build time: Mon Jan 28 12:58:08 2019 (1548680288)
-Build timestamp: 1548680288
-Build timestamp as int: 1548680288
-```
-
 ## Additional dependencies
 
 The following packages are used by Asylo and its dependencies, and must also be

README.md

@@ -59,10 +59,6 @@ for additional details on how to pull images from Google's Container Registry.
 Some of Asylo's tests require IPv6 to be enabled in your Docker daemon. See this
 [guide](https://docs.docker.com/config/daemon/ipv6/) for how to enable IPv6.
 
-**Note**: If the Docker daemon fails to start with `"ipv6": true` added to the
-daemon.json file, you may also need to explicitly configure IPv6 subnet as shown
-[here](https://docs.docker.com/v17.09/engine/userguide/networking/default_network/ipv6/).
-
 ### Examples
 
 #### Running the `hello_world` example