alsa-mixer: Ignore some elements in the analog-output path

The analog-output path should be suppressed when there are more
specific paths available. Currently that usually doesn't happen. The
suppression can be done with the path subset detection, and this patch
makes that work (another approach would be to mark the elements as
required-absent, like analog-input does, but I like the subset
suppression more, because it requires less stuff in the configuration
files). The problem with listing the now-removed elements in
analog-output.conf was that if the sound card had e.g. a Speaker
element, then the switch behaviour was different between analog-output
and analog-output-speakers, so analog-output was not considered a
subset of analog-output-speakers.

BugLink: https://bugs.freedesktop.org/show_bug.cgi?id=74609

src/modules/alsa/mixer/paths/analog-output.conf

@@ -22,14 +22,6 @@
 [General]
 priority = 99
 
-[Jack Line Out]
-state.plugged = unknown
-state.unplugged = unknown
-
-[Jack Line Out Phantom]
-state.plugged = unknown
-state.unplugged = unknown
-
 [Element Hardware Master]
 switch = mute
 volume = merge
@@ -46,28 +38,6 @@ override-map.2 = all-left,all-right
 switch = off
 volume = off
 
-[Element Line HP Swap]
-switch = off
-
-; This profile path is intended to control the default output, not the
-; headphones. But it should not hurt if we leave the headphone jack
-; enabled nonetheless.
-[Element Headphone]
-switch = mute
-volume = zero
-
-[Element Headphone2]
-switch = mute
-volume = zero
-
-[Element Speaker]
-switch = mute
-volume = off
-
-[Element Desktop Speaker]
-switch = mute
-volume = off
-
 [Element Front]
 switch = mute
 volume = merge