Documentation: Exclude pipeline handlers directory

The pipeline handlers don't define APIs, neither public not internal.
There is thus no need to generate Doxygen documentation from thoses
classes. Add them to the EXCLUDE files pattern.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

0 files changed, 0 insertions, 0 deletions