remove useless travis install

.travis.yml

 install:
   - "cd tracim && python setup.py develop; cd -"
   - "pip install -r install/requirements.txt; echo"
-  - "./bin/tg2env-patch 1 /home/travis/virtualenv/python3.2.5/lib/python3.2/site-packages"
-  - "pip install -r install/requirements.txt; echo"
-  - "./bin/tg2env-patch 2 /home/travis/virtualenv/python3.2.5/lib/python3.2/site-packages"
   - "pip install coveralls"
 
 before_script: