Revert "is sudo required for travis"

This reverts commit ddd3bc5.

Author: mikofski

.travis.yml

@@ -1,4 +1,8 @@
 language: python
+sudo: required
+before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y libatlas-dev liblapack-dev libblas-dev gfortran
 before_script:
   - python /home/travis/build/SunPower/SolarUtils/setup.py bdist_wheel
   - pip install /home/travis/build/SunPower/SolarUtils/dist/SolarUtils-*.whl