Remove codes related to UCM

Remove codes related to UCM

The HDMI audio device could not be detected from PulseAudio,
it is impossible to set the HDMI device to UCM which leads to
set "PCM Playback Route" mixer value to 2(HDMI).

Hence, we decide to set the mixer value to 0(Auto) and leave it
without any UCM setting.

With the HDMI connected booting, sound will be played through the HDMI.
Otherwise sound will be played through the audiojack.

[Version] 0.1.6
[Issue Type] Bug fix

Change-Id: I6f87eee5bd074f32763f2c4a99bc738fe547d266
Signed-off-by: Sangchul Lee <sc11.lee@samsung.com>