Revert "Numpy ufunc methods are also inferred as Uninferable"

This reverts commit b699ebb.

The fixes to context.path also appears to stop returning Uninferable for
numpy ufuncs.

tests/unittest_regrtest.py

@@ -100,7 +100,7 @@ def test_numpy_crash(self):
         astroid = builder.string_build(data, __name__, __file__)
         callfunc = astroid.body[1].value.func
         inferred = callfunc.inferred()
-        self.assertEqual(len(inferred), 2)
+        self.assertEqual(len(inferred), 1)
 
     def test_nameconstant(self):
         # used to fail for Python 3.4