Remove OMA-DM

* This was removed in 5.0.0_r7.0.1

Change-Id: I390b5fb6a09541bb829d239e038e056c85d66d65
Merge PAC-man/pac-5.0 into pac-5.0

Change-Id: I5d68b07e1ca1dfb25c570fd0dfb1bb73a9062954