[ci] drop openjdk13

hazendaz · hazendaz · commit 40eb91330721 · 2020-08-24T07:52:03.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,7 +3,6 @@ language: java
 jdk:
   - openjdk15
   - openjdk14
-  - openjdk13
   - openjdk11
   - openjdk8
 
