[BEANUTILS-504] Update from Java 6 to 7

.travis.yml: remove jdk 6 build

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/trunk@1823084 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.travis.yml b/.travis.yml
index 41a3c86..b8af9ed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,6 @@
 dist: precise

 

 jdk:

-  - openjdk6

   - openjdk7

   - oraclejdk8