remove manual install xdebug for php 7.1

Author: samsonasik

.travis.yml

@@ -14,7 +14,6 @@ before_script:
   - composer self-update
   - composer install --prefer-source --no-interaction
   - composer dump-autoload -o
-  - if [[ $TRAVIS_PHP_VERSION = 7.1 ]]; then git clone git://github.com/xdebug/xdebug.git && cd xdebug && phpize && ./configure --enable-xdebug  && make && make install && echo "zend_extension = xdebug.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini && cd ..; fi
 
 script:
   - bin/kahlan --coverage=4 --reporter=verbose --clover=build/logs/clover.xml