drm/i915/crt: Remove obsolete kerneldoc-esque comment

The code describes what it is doing quite well; and that is now much
more complex than what the old comment would let you believe.

drivers/gpu/drm/i915/intel_crt.c:486: warning: Function parameter or member 'connector' not described in 'intel_crt_detect_hotplug'

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180214092909.27040-1-chris@chris-wilson.co.uk