Remove JDK 9 build on Travis CI

acogoluegnes · acogoluegnes · commit d453ba02dba5 · 2018-10-17T10:09:11.000+02:00
JDK 9 is no longer supported and there's now a Concourse CI multi-JDK
test pipeline for RabbitMQ-related Java projects.
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,6 @@ sudo: required
 language: java
 jdk:
   - oraclejdk8
-  - oraclejdk9
 
 notifications:
   email:
