Importing the popen2 module in Python-2.6 results in the
"DeprecationWarning: The popen2 module is deprecated. Use the
subprocess module." message. The module itself isn't used in fact, so
just removing it solves the problem.
Signed-off-by: Miklos Vajna <vmiklos@frugalware.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>