SONARPHP-1302 Move custom rules example to sonar-php (#78)

* SONARPHP-1302 Move custom rules example to sonar-php

* SONARPHP-1302 Fix Travis

Author: mstachniuk

php-custom-rules/README.md

@@ -1,10 +1,3 @@
-[![Quality Gate](https://sonarcloud.io/api/project_badges/measure?project=org.sonarsource.samples%3Aphp-custom-rules&metric=alert_status)](https://sonarcloud.io/dashboard?id=org.sonarsource.samples%3Aphp-custom-rules)
-
 This example demonstrates how to write **Custom Rules** for SonarPHP.
 
-# API Changes
-
-## 3.2 
-
-* Added a new PHPCheck#terminate method, which is called at the end of the analysis 
-* Added a new PhpFile#uri method to retrieve the underlying file URI
+## This example was moved to [sonar-php/php-custom-rules](https://github.com/SonarSource/sonar-php/tree/master/php-custom-rules).