remove unused nightly check

Author: samsonasik

.travis.yml

@@ -19,8 +19,7 @@ before_script:
 script:
   - composer cs-check
   - if [[ $TRAVIS_PHP_VERSION = 7.1 ]]; then bin/phpstan analyse src/ --level=max -c phpstan.neon; fi
-  - if [[ $TRAVIS_PHP_VERSION != "nightly" ]]; then bin/kahlan --coverage=4 --reporter=verbose --clover=build/logs/clover.xml; fi
-  - if [[ $TRAVIS_PHP_VERSION = "nightly" ]]; then bin/kahlan; fi
+  - bin/kahlan --coverage=4 --reporter=verbose --clover=build/logs/clover.xml
   - if [[ $TRAVIS_PHP_VERSION = 7.1 ]]; then bin/php-coveralls -v --exclude-no-stmt; fi
 
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