remove - os: linux jdk: oraclejdk8

travis-ci/travis-ci#10290

Author: vharseko

.travis.yml

@@ -65,8 +65,6 @@ matrix:
       -   docker build ./opendj-packages/opendj-docker -t docker.pkg.github.com/openidentityplatform/opendj/opendj -t docker.pkg.github.com/openidentityplatform/opendj/opendj:$git_version
       -   #docker push docker.pkg.github.com/openidentityplatform/opendj/opendj:$git_version
       -   #docker push docker.pkg.github.com/openidentityplatform/opendj/opendj         
-  - os: linux
-    jdk: oraclejdk8
   - os: linux
     jdk: oraclejdk11
   - os: linux