Revert "restapi: RSDL - add 'deprecated' option"

This reverts commit 116071a9549101f9f29f650998fcbcfaded02d82.

Reason for revert: The patch will be resubmitted shortly with a small addition. I prefer it this way than to have the change split across two patches. 

Change-Id: Ie4c0b203204eaaa2a1a90f166f769c55c8d861f5
Signed-off-by: Ori Liel <oliel@redhat.com>