Clean tests

.travis.yml

@@ -5,13 +5,6 @@ python:
   - 3.4
   - 3.5
 
-install:
-  - pip install sqlalchemy
-  - pip install nose-cov
-  - pip install pam
-  - pip install requests
-  - pip install dulwich
-
 script: nosetests
 
 sudo: false