Remove support for python 2.7 in the metadata

Author: rbeucher

setup.py

@@ -187,8 +187,6 @@ def write_version_py(filename='UWGeodynamics/version.py'):
 
         # Specify the Python versions you support here. In particular, ensure
         # that you indicate whether you support Python 2, Python 3 or both.
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',