Cleanup unused docker related files in this repository

README.md

@@ -50,22 +50,3 @@ The following script can be used to build a host image for Google Compute Engine
 
 [Check out the AOSP tree](https://source.android.com/setup/build/downloading)
 to obtain the script.
-
-## Docker
-
-The Debian packages can also be built in a docker container. Dockerfile and
-build scripts are included in this repository, just run:
-
-```
-    docker/build.sh --build_debs_only --rebuild_debs_verbose
-```
-
-The command will build the container, if needed, that builds the Debian packages,
-and builds the Debian packages within the container. The resultant packages will
-be located under the ```docker/out``` directory.
-
-This repository also contains a Dockerfile that can be used to construct an
-image for a privileged Docker container, which in turn can boot the cuttlefish
-device.  Such an image allows one to develop for Cuttlefish without having to
-install a number of packages directly on the host machine. For more details,
-read the [docker instructions](docker/README.md).