remove clone already performed through oca_dependencies.txt

.travis.yml

@@ -28,7 +28,6 @@ before_install:
   - "sh -e /etc/init.d/xvfb start"
 
 install:
-  - git clone https://github.com/OCA/reporting-engine.git ${HOME}/reporting-engine -b ${VERSION}
   - git clone https://github.com/OCA/maintainer-quality-tools.git ${HOME}/maintainer-quality-tools
   - export PATH=${HOME}/maintainer-quality-tools/travis:${PATH}
   - travis_install_nightly