Revert "Add BCM21553 camera parameters support"

This reverts commit 43cc8142472825c6d458116dbfb4b9e86e876bde.
Revert "CameraParameters::getMode() is currently an empty function until I figure out what's needed."

This reverts commit c6d65eac5c4273b63516948e6cea224219b4f2c3.