This legacy service is no longer used and was deprecated during the
Stein cycle [1]. It's time to say adios and remove them in their
entirety. This is pretty straightforward, with the sole exception of
schema for the 'remote-consoles' API, which has to continue supporting
requests for type 'xvpvnc' even if we can't fulfil those requests now.
[1] https://review.opendev.org/#/c/610076/
Part of blueprint remove-xvpvncproxy
Depends-On: https://review.opendev.org/695853
Change-Id: I2f7f2379d0cd54e4d0a91008ddb44858cfc5a4cf
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>