Temporarily (?) remove make dependencies on deployqt target

Definitely avoid deploying Qt multiple times, since
this might be a reason for code signature verification on OS X bailing
out, claiming that files have been modified.

Change-Id: Ic45b6fd4af75a3b972aec8c0b4841f0ff4e7886d
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>