Remove jdks from travis matrix

Author: estolfo

.travis.yml

@@ -9,10 +9,6 @@ rvm:
   - jruby-19mode
   - jruby-9.1.12.0
 
-jdk:
-  - openjdk7
-  - oraclejdk8
-
 before_install:
   - gem update bundler
 
@@ -48,16 +44,3 @@ branches:
 matrix:
   allow_failures:
     - rvm: ruby-head
-  exclude:
-    - rvm: 1.9.3
-      jdk: openjdk7
-    - rvm: 1.9.3
-      jdk: oraclejdk8
-    - rvm: 2.4.2
-      jdk: openjdk7
-    - rvm: 2.4.2
-      jdk: oraclejdk8
-    - rvm: ruby-head
-      jdk: openjdk7
-    - rvm: ruby-head
-      jdk: oraclejdk8