Doc: Cleanup diagram placeholder in Camera Overview
Doc: Cleanup diagram placeholder in Camera Overview

The diagram still needs to be done, but is not necessary for the 5.0
release.

Task-number: QTBUG-28235
Change-Id: I1e8b4d731c00516408de89be81d4ecb8bde3d016
Reviewed-by: Paul Olav Tvete <97541fb6312d77f06e19078c7c70b2c1f75fb828@digia.com>

nezticle/qtmultimedia,sergiusens/qtmultimedia,webOS-ports/qtmultimedia,jfaust/qtmultimedia,mer-qt/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,mer-qt/qtmultimedia,mer-qt/qtmultimedia,jfaust/qtmultimedia,webOS-ports/qtmultimedia,sergiusens/qtmultimedia,webOS-ports/qtmultimedia,mer-qt/qtmultimedia,webOS-ports/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,jfaust/qtmultimedia,nezticle/qtmultimedia,sergiusens/qtmultimedia,jfaust/qtmultimedia,nezticle/qtmultimedia,nezticle/qtmultimedia