Revert "Add coveralls.io"

This reverts commit 60de132048.

.travis.yml

@@ -17,7 +17,6 @@ matrix:
 
 install:
   - composer self-update
-  - composer require satooshi/php-coveralls:0.7.*@dev
 
 before_script:
   - mysql --user=root -e "CREATE USER 'foo'@'localhost' IDENTIFIED BY 'foo';"
@@ -29,9 +28,6 @@ script: ant
 notifications:
   email: false
 
-after_script:
-  - sh -c 'if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then php vendor/bin/coveralls -v; fi;'
-
 deploy:
   provider: releases
   api-key: