Fix travis.yml

Author: maxnoe

.travis.yml

@@ -10,7 +10,6 @@ before_install:
   - chmod +x miniconda.sh
   - ./miniconda.sh -b -p /home/travis/miniconda 
   - export PATH=/home/travis/miniconda/bin:$PATH
-  - conda update --yes conda
   # The next couple lines fix a crash with multiprocessing on Travis and are not specific to using Miniconda
   - sudo rm -rf /dev/shm
   - sudo ln -s /run/shm /dev/shm