Remove oraclejdk7 that has been deprecated on travis

zmarkan · zmarkan · commit f4f18d5a36f9 · 2017-11-09T10:16:59.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -2,6 +2,5 @@ language: java
 sudo: false
 jdk:
   - oraclejdk8
-  - oraclejdk7
 script:
   - ./gradlew test
