ALSA: Drop leftover snd-rtctimer stuff from Makefile

BugLink: https://bugs.launchpad.net/bugs/2060209

[ Upstream commit 4df4971 ]

We forgot to remove the line for snd-rtctimer from Makefile while
dropping the functionality.  Get rid of the stale line.

Fixes: 34ce71a ("ALSA: timer: remove legacy rtctimer")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Manuel Diewald <[email protected]>
Signed-off-by: Roxana Nicolescu <[email protected]>

Author: tiwai

sound/core/Makefile

@@ -33,7 +33,6 @@ snd-ctl-led-objs  := control_led.o
 snd-rawmidi-objs  := rawmidi.o
 snd-timer-objs    := timer.o
 snd-hrtimer-objs  := hrtimer.o
-snd-rtctimer-objs := rtctimer.o
 snd-hwdep-objs    := hwdep.o
 snd-seq-device-objs := seq_device.o