Attempt to fix travis build for python 3.4. Not sure why it isn't working.

Author: jcrudy

.travis.yml

@@ -14,6 +14,6 @@ before_install:
   - sudo ln -s /run/shm /dev/shm
 # Install packages
 install:
-  - conda install --yes python=$TRAVIS_PYTHON_VERSION cython numpy scipy matplotlib nose dateutil pandas patsy statsmodels scikit-learn sympy
+  - conda install --yes cython numpy scipy matplotlib nose dateutil pandas patsy statsmodels scikit-learn sympy
   - python setup.py build_ext --inplace --cythonize
 script: nosetests -s -v pyearth