Remove custom deploy, revert back to basic Heroku

wercker.yml

@@ -10,25 +10,3 @@ build:
         name: Run unit testing
         code: |
           python setup.py test
-deploy:
-  steps:
-    - add-to-known_hosts:
-        hostname: $TARGET_HOST
-    - mktemp:
-        envvar: PRIVATEKEY_PATH
-    - create-file:
-        name: write key
-        filename: $PRIVATEKEY_PATH
-        content: $SSH_KEY_PRIVATE
-        overwrite: true
-        hide-from-log: true
-    - script:
-        name: transfer application
-        code: |
-          scp -r -i $PRIVATEKEY_PATH -o StrictHostKeyChecking=no -o UserKnownHostsFile=no * $TARGET_USER@$TARGET_HOST:dropbot/
-    - script:
-        name: building virtualenv
-        code: ssh -i $PRIVATEKEY_PATH -l $TARGET_USER -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $TARGET_HOST virtualenv venv --no-site-packages
-    - script:
-        name: installing requirements
-        code: ssh -i $PRIVATEKEY_PATH -l $TARGET_USER -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $TARGET_HOST "source venv/bin/activate && cd dropbot/ && pip install -r requirements.txt"