Remove JS custom rules example (#70)

Author: saberduck

javascript-custom-rules/README.md

@@ -1,8 +1,4 @@
-[![Quality Gate](https://sonarcloud.io/api/project_badges/measure?project=org.sonarsource.samples%3Ajavascript-custom-rules&metric=alert_status)](https://sonarcloud.io/dashboard?id=org.sonarsource.samples%3Ajavascript-custom-rules)
-
-This example demonstrates how to write **Custom Rules** for SonarJS.
-
 ### **_IMPORTANT NOTE_**
-**Since SonarJS 6.0, custum rules are _DEPRECATED_.**
+**Custom rule support was removed in SonarQube 8.9 LTS**
 
 As a replacement, we suggest you to have a look at [ESLint](https://eslint.org/docs/developer-guide/), it provides custom rules that you can then import thanks to the [external issues](https://docs.sonarqube.org/latest/analysis/external-issues/) feature.