Remove zanata configuration from .travis.yml

There's a deploy job to push to zanata in Travis. It caused Travis
failed when when PR is merged into master. Since we do not use
zanata any more, zanata setting should be removed.
Failed deploy job can be found from
https://travis-ci.org/github/weldr/cockpit-composer/jobs/667298469?utm_medium=notification&utm_source=github_status

Closes #918

.travis.yml

@@ -24,28 +24,12 @@ install:
             npm install
         fi
 env:
-  global:
-    - CXX=g++-4.8
-    - secure: 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
-    - ZANATA_USER=dshea
   matrix:
     - COMMAND=eslint
     - COMMAND=stylelint
     - COMMAND=test_rpmbuild
 script:
   - make "$COMMAND"
-jobs:
-  include:
-    - stage: deploy
-      script: make po-push
-      env: COMMAND=none
-      if: branch = master AND type = push
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - g++-4.8
 notifications:
   email:
     on_failure: change