scripts: Remove bogus patch to software-update.conf
scripts: Remove bogus patch to software-update.conf

This caused a build break after http://codereview.chromium.org/3995007 was
committed, since we try to patch a now-nonexistent file.

BUG=None
TEST=Adhoc
./mod_image_for_test.sh --factory_install doesn't hang

Change-Id: Iac299c850765eedfcefcffb80c385b0e8c0fa277
Signed-off-by: Elly Jones <ellyjones@chromium.org>
Signed-off-by: Kliegs <kliegs@chromium.org>

Review URL: http://codereview.chromium.org/3973004

bcwaldon/coreos-scripts,endocode/scripts,zhang0137/scripts,endocode/scripts,smilart/scripts,zhang0137/scripts,vmware/coreos-scripts,glevand/coreos--scripts,andrejro/coreos--scripts,smilart/scripts,marineam/coreos-scripts,sigma/coreos-scripts,mjg59/scripts,fivethreeo/scripts,mischief/scripts,BugRoger/scripts,crawford/scripts,bcwaldon/coreos-scripts,BugRoger/scripts,bcwaldon/coreos-scripts,glevand/coreos--scripts,endocode/scripts,mischief/scripts,crawford/scripts,fivethreeo/scripts,nicescale/scripts,mjg59/scripts,trnubo/scripts,trnubo/scripts,mjg59/scripts,andrejro/coreos--scripts,zhang0137/scripts,coreos/scripts,BugRoger/scripts,trnubo/scripts,smilart/scripts,vmware/coreos-scripts,mischief/scripts,gtank/scripts,gtank/scripts,sigma/coreos-scripts,sigma/coreos-scripts,vmware/coreos-scripts,gtank/scripts,coreos/scripts,nicescale/scripts,nicescale/scripts,fivethreeo/scripts,marineam/coreos-scripts,andrejro/coreos--scripts,crawford/scripts,marineam/coreos-scripts