delete class facilities::dc-cam-transcoder

it's not used anywhere and we would like to
cleanup manifests that are not organized in modules

if there are plans to enhance and use it in the future
it should be moved/restarted to a module for the cameras

Change-Id: I2c46edcd495567f6a9583e702b637ff3ca25de7d
Merge "delete class facilities::dc-cam-transcoder" into production