drm/i915: Remove nop bigjoiner state copy

We just copied over the whole master crtc state, including
cpu_transcoder+has_audio. No need to copy those again.

Also get rid of the unhelpful comment.
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220223131315.18016-4-ville.syrjala@linux.intel.com

drivers/gpu/drm/i915/display/intel_display.c

@@ -5593,12 +5593,9 @@ copy_bigjoiner_crtc_state_modeset(struct intel_atomic_state *state,
 
 	copy_bigjoiner_crtc_state_nomodeset(state, slave_crtc);
 
-	/* Some fixups */
 	slave_crtc_state->uapi.mode_changed = master_crtc_state->uapi.mode_changed;
 	slave_crtc_state->uapi.connectors_changed = master_crtc_state->uapi.connectors_changed;
 	slave_crtc_state->uapi.active_changed = master_crtc_state->uapi.active_changed;
-	slave_crtc_state->cpu_transcoder = master_crtc_state->cpu_transcoder;
-	slave_crtc_state->has_audio = master_crtc_state->has_audio;
 
 	return 0;
 }