[travis] Drop jdk 7 support

hazendaz · hazendaz · commit 7309ca6d7450 · 2018-12-20T18:57:11.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,6 @@ language: java
 jdk:
   - oraclejdk11
   - oraclejdk8
-  - openjdk7
 
 after_success:
   - chmod -R 777 ./travis/after_success.sh
