Remove before_install section

Moved to requirements.txt

Author: jmenglund

.travis.yml

@@ -9,12 +9,6 @@ branches:
     only:
         - master
 
-#before_install:
-#    - pip install codecov
-#    - pip install pytest pytest-cov
-#    - pip install biopython
-#    - pip install dendropy
-
 script:
     py.test --cov=pandascharm.py