Remove failing / unused cron job

Author: SMadani

.github/workflows/metrics.yml

@@ -3,7 +3,7 @@
 ![Java](https://img.shields.io/badge/java-8%2B-blue)
 [![Maven Release](https://maven-badges.herokuapp.com/maven-central/com.tokbox/opentok-server-sdk/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.tokbox/opentok-server-sdk)
 [![Build Status](https://github.com/opentok/Opentok-Java-SDK/actions/workflows/build.yml/badge.svg)](https://github.com/opentok/Opentok-Java-SDK/actions/workflows/build.yml")
- [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v2.0%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
+[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v2.0%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE.txt)
 
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