Remove Slack notification from Travis CI

Author: carlbennett

.travis.yml

@@ -26,6 +26,3 @@ before_script:
 script:
   - bash -c 'set -e;for file in $(find ./src -type f -regex .*\.php -print); do
     php -e -l -f "$file"; done'
-notifications:
-  slack:
-    secure: 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