don't use requirements.txt file in travis

.travis.yml

@@ -1,32 +1,31 b''
 language: python
 python:
   - "2.5"
   - "2.6"
   - "2.7"
 
 env:  
   - TEST_DB=sqlite:////tmp/rhodecode_test.sqlite
   - TEST_DB=mysql://root@127.0.0.1/rhodecode_test
   - TEST_DB=postgresql://postgres@127.0.0.1/rhodecode_test
 
 # command to install dependencies
 before_script:
   - mysql -e 'create database rhodecode_test;'
   - psql -c 'create database rhodecode_test;' -U postgres
 
 install:
   - pip install mysql-python psycopg2 mock unittest2
   - pip install https://bitbucket.org/mchaput/whoosh/get/2.4x.zip
   - pip install . --use-mirrors
-  - pip install -r requirements.txt --use-mirrors
 # command to run tests
 script: nosetests
 
 notifications:
     email:
         - [e-mail]
     irc: "irc.freenode.org#rhodecode"
 
 branches:
   only:
     - dev