Drop Coveralls

.coveralls.yml

-coverage_clover: clover.xml
-json_path: /tmp/coveralls-upload.json

.travis.yml

@@ -11,8 +11,6 @@ before_install:
   - |
     if [ "x$COVERAGE" == "xyes" ]; then
       pecl install pcov-1.0.0
-      wget https://github.com/php-coveralls/php-coveralls/releases/download/v2.2.0/php-coveralls.phar --output-document="${HOME}/bin/coveralls"
-      chmod +x ${HOME}/bin/coveralls
     fi
 
 before_script:
@@ -33,12 +31,6 @@ script:
        ./vendor/bin/phpunit --configuration tests/travis/$DB.travis.xml
     fi
 
-after_script:
-  - |
-    if [ "x$COVERAGE" == "xyes" ]; then
-      travis_retry coveralls -v
-    fi
-
 after_success:
   - |
     if [ "x$COVERAGE" == "xyes" ]; then