As per mailing list discussion, remove Java 7
diff --git a/.travis.yml b/.travis.yml
index 894ee36..c3baf70 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,14 +46,6 @@
       env:
         - FLINK_VERSION="1.3.0" SCALA_VERSION="2.10"
         - CACHE_NAME=JDK8_F130_D
-    - jdk: openjdk7
-      env:
-        - FLINK_VERSION="1.3.0" SCALA_VERSION="2.11"
-        - CACHE_NAME=JDK7_F130_A
-    - jdk: openjdk7
-      env:
-        - FLINK_VERSION="1.3.0" SCALA_VERSION="2.10"
-        - CACHE_NAME=JDK7_F130_B
 
 before_install:
   - ./dev/change-scala-version.sh $SCALA_VERSION