Drop common-build-dependencies from runtime dependencies

This module is not part of our shipped compose.  Besides, build
dependencies shouldn't be required at runtime in general.  If
the module requires any of the common-build-dependencies components
at runtime, they should be moved to shared-userspace.

Signed-off-by: Petr Šabata <contyk@redhat.com>

sssd.yaml

@@ -15,7 +15,6 @@ data:
         requires:
             base-runtime: f26
             perl: f26
-            common-build-dependencies: f26
             shared-userspace: f26
     references:
         community: https://fedoraproject.org/wiki/Modularity