Merge test cleanup from 3.5 into 3.6

Lib/ctypes/test/test_find.py

 import unittest
-import os, os.path
+import os.path
 import sys
 import test.support
 from ctypes import *
@@ -112,28 +112,5 @@ class LibPathFindTest(unittest.TestCase):
                 self.assertEqual(find_library(libname), 'lib%s.so' % libname)
 
 
-# On platforms where the default shared library suffix is '.so',
-# at least some libraries can be loaded as attributes of the cdll
-# object, since ctypes now tries loading the lib again
-# with '.so' appended of the first try fails.
-#
-# Won't work for libc, unfortunately.  OTOH, it isn't
-# needed for libc since this is already mapped into the current
-# process (?)
-#
-# On MAC OSX, it won't work either, because dlopen() needs a full path,
-# and the default suffix is either none or '.dylib'.
-@unittest.skip('test disabled')
-@unittest.skipUnless(os.name=="posix" and sys.platform != "darwin",
-                     'test not suitable for this platform')
-class LoadLibs(unittest.TestCase):
-    def test_libm(self):
-        import math
-        libm = cdll.libm
-        sqrt = libm.sqrt
-        sqrt.argtypes = (c_double,)
-        sqrt.restype = c_double
-        self.assertEqual(sqrt(2), math.sqrt(2))
-
 if __name__ == "__main__":
     unittest.main()