chore: remove build badges

b/468377909

Author: suztomo

README.md

@@ -71,13 +71,7 @@ mvn install:install-file \
 cd -
 ```
 
-## CI Status
 
-Java Version | Status
------------- | ------
-Java 7 | [![Kokoro CI](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java7.svg)](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java7.html)
-Java 8 | [![Kokoro CI](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java8.svg)](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java8.html)
-Java 11 | [![Kokoro CI](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java11.svg)](https://storage.googleapis.com/cloud-devrel-public/java/badges/google-api-java-client/java11.html)
 
 ## Dependencies
 This library is built on top of two common libraries, also built by Google, and also designed to