Revert "sound: workaround softvol channels initialization by running dummy aplay and arecord"

Reported to hang boot on a DELL Optiplex 755 with:

00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 02)
	Subsystem: Dell Optiplex 755

Codec: Analog Devices AD1984
Address: 0
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x11d41984
Subsystem Id: 0x10280211
Revision Id: 0x100400

A recent patch to libalsa should be the upstream solution to the KWin crash problem this patch was intended to fix.

This reverts commit 30e0db1d.

postplug.d/35sound

@@ -93,11 +93,7 @@ if [ "$SOUND_FORCE_RESCAN" != "on" -a "$SOUND_FORCE_RESCAN" != "1" ]; then
    fi
 fi
 
-# WORKAROUND: custom softvol controls are not actived until a play/rec is done
-#             this also triggers kmix crash problem at first boot
-aplay -q -d1 < /dev/zero
-arecord -q -d1 > /dev/null
-
+echo "$SOUND_DEV" > $postpluglibdir/sound.cache
 for c in /proc/asound/card[0-9]*; do
    id=`cat $c/id`
    codec=`grep Codec: $c/codec* 2>/dev/null | head -n1`
@@ -108,7 +104,9 @@ done
 
 if [ -x /usr/sbin/alsactl ]; then
    logmsg "$me" $"saving the mixer setup (/var/lib/sound/asound.state)"
-   /usr/sbin/alsactl store > /dev/null
+   /usr/sbin/alsactl store >/dev/null
 fi
+
 echo "$SOUND_DEV" > $postpluglibdir/sound.cache
+
 exit 0