omniorb: fix autobuilder failure

http://autobuild.buildroot.net/results/e3244abc550a95eb69e63b8db203f39b27f3288e/



Turns out omniorb isn't building because of an old cross compile patch.
The last patchset was missing the delete.

Signed-off-by: Matt Weber <mlweber1@rockwellcollins.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>