remove dead utils.upgradedir

closes  #2767

IPython/utils/tests/test_imports.py

@@ -18,9 +18,6 b' def test_import_rlineimpl():'
 def test_import_strdispatch():
     from IPython.utils import strdispatch
 
-def test_import_upgradedir():
-    from IPython.utils import upgradedir
-
 def test_import_wildcard():
     from IPython.utils import wildcard