dev-python/pygraphviz: remove unused patch

Closes: https://github.com/gentoo/gentoo/pull/2362

Signed-off-by: David Seifert <soap@gentoo.org>

dev-python/pygraphviz/files/pygraphviz-1.1-avoid_tests.patch

@@ -1,41 +0,0 @@
---- pygraphviz/agraph.py
-+++ pygraphviz/agraph.py
-@@ -1767,29 +1767,3 @@
-                        value.decode(self.encoding))
-             except KeyError: # gv.agxget returned KeyError, skip
-                 continue
--    
--
--
--def _test_suite():
--    import doctest
--    suite = doctest.DocFileSuite('tests/graph.txt',
--                                 'tests/attributes.txt',
--                                 'tests/layout_draw.txt',
--                                 'tests/subgraph.txt',
--                                 package='pygraphviz')
--    doctest.testmod() # test docstrings in module
--    return suite
--
--
--if __name__ == "__main__":
--    import os
--    import sys
--    import unittest
--    if sys.version_info[:2] < (2, 4):
--        print "Python version 2.4 or later required for tests (%d.%d detected)." %  sys.version_info[:2]
--        sys.exit(-1)
--    # directory of package (relative to this)
--    nxbase=sys.path[0]+os.sep+os.pardir
--    sys.path.insert(0,nxbase) # prepend to search path
--    unittest.TextTestRunner().run(_test_suite())
--    
---- pygraphviz/__init__.py
-+++ pygraphviz/__init__.py
-@@ -67,6 +67,3 @@
-     print "pygraphviz-"+__version__
-     neato=_get_prog('neato')
-     os.system(neato+' -V')
--
--# import tests: run as pygraphviz.test()
--from tests import run as test