Remove unnecessary babel.cfg

This file is no longer used in translation process. The same file was
removed from keystone by [1].

[1] e3b3df7974ad3f40a6bba4b2e067b51bdb8b0b29

Change-Id: I6f905a9af7ea16243fb726b3232d3254861d4ad5
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>
1 file changed