Remove the namespace declaration

After installing the package via pip, the __init__.py from the source
distribution does not exist. It is instead replaced by:

  pyga-2.4.2-py2.7-nspkg.pth

Which does some magic to make sure that sys.modules is updated correctly

I am installing pyga and deploying it to appspot and the import fails
because __init__.py is missing.

Author: nickjoyce-wf

pyga/__init__.py

@@ -1,5 +1,3 @@
-__import__('pkg_resources').declare_namespace(__name__)
-
 from pyga.requests import Q
 
 def shutdown():

setup.py

@@ -21,7 +21,6 @@
       requires=[],
       install_requires=['setuptools', ],
       packages=find_packages(),
-      namespace_packages=['pyga'],
       classifiers=[
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',