Revert "add openjdk to travis (#3300)"

lovepoem · web-flow · commit 3aa712ac155a · 2019-03-12T22:28:59.000+08:00
This reverts commit bf3b423.
diff --git a/.travis.yml b/.travis.yml
@@ -2,9 +2,7 @@ language: java
 sudo: false # faster builds
 
 jdk:
-  - openjdk11
   - oraclejdk11
-  - openjdk8
   - oraclejdk8
 
 cache:
