vo_opengl: remove icc profile options from runtime-settable options

Because of the icc-profile-auto option (which was added at a later
point), supporting this would probably be slightly messy: the ICC
profile can spontaneously update, and then it would overwrite the
previously set options.

Don't make icc-profile-auto fatal if unsupported. The "auto" indicates
that it will use whatever it finds, even if it's nothing.

Also add a warning; before this commit, it just refused to initialize
without explanation.

As a mostly unrelated cosmetic change, remove redundant parameters which
had no point anymore.

Probably fixes #1359 (or rather works it around by disallowing it).