Revert "Merge branch 'docker-test'"

This reverts commit 28fc868, reversing
changes made to ef553d3.

.travis.yml

@@ -4,17 +4,3 @@ after_success:
 node_js:
   - '6'
   - '8'
-jobs:
-  include:
-    - stage: deploy
-      if: branch = master
-      node_js: '8'
-      services:
-        - docker
-      script: skip
-      after_success: echo Skipping coverage.
-      deploy:
-        provider: script
-        script: bash docker-deploy.sh
-        on:
-          branch: master

README.md

@@ -37,24 +37,6 @@ import config from './config.json';
 discordIRC(config);
 ```
 
-## Docker
-As an alternative to running discord-irc directly on your machine, we provide a [Docker container image](https://hub.docker.com/reactiflux/discord-irc).
-After creating a configuration file, you can fetch the image from Docker Hub and run it with the following command:
-
-```bash
-docker run -v /path/to/config:/config/config.json reactiflux/discord-irc
-```
-
-If you've checked out the repository already, you can build the Docker image locally and run that instead:
-
-```bash
-docker build -t discord-irc .
-docker run -v /path/to/config:/config/config.json discord-irc
-```
-
-Note that the path to the config file on the host (`/path/to/config`) _must_ be a valid absolute path to a config file.
-Otherwise, you may get the error "illegal operation on a directory".
-
 ## Configuration
 First you need to create a Discord bot user, which you can do by following the instructions [here](https://github.com/reactiflux/discord-irc/wiki/Creating-a-discord-bot-&-getting-a-token).