libcontainerd/supervisor: remove unused options
libcontainerd/supervisor: remove unused options

This removes the `WithRemoteAddr()`, `WithRemoteAddrUser()`, `WithDebugAddress()`,
and `WithMetricsAddress()` options, added in ddae20c032058a0fd42c34c2e9750ee8f6296ac8,
but most of them were never used, and `WithRemoteAddr()` no longer in use since
dd2e19ebd58cd8896d79b4b8db61144b93717b33.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

mahak/docker,Mokolea/docker,jimjag/docker,moul/docker,trebonian/docker,mahak/docker,cpuguy83/docker,trebonian/docker,Ramzec/docker,moby/moby,Ramzec/docker,jimjag/docker,trebonian/docker,cpuguy83/docker,thaJeztah/docker,jimjag/docker,Ramzec/docker,thaJeztah/docker,moby/moby,konstruktoid/docker-upstream,konstruktoid/docker-upstream,thaJeztah/docker,Mokolea/docker,moul/docker,cpuguy83/docker,Mokolea/docker,Mokolea/docker,jimjag/docker,trebonian/docker,moby/moby,moby/moby,moul/docker,Ramzec/docker,cpuguy83/docker,mahak/docker,konstruktoid/docker-upstream,mahak/docker,moul/docker,thaJeztah/docker,konstruktoid/docker-upstream