Remove audio_effects.conf

The old audio_effect.conf included in this device tree was overwriting
the one that is included with the DSP Manager source.

Remove this one so that the proper audio_effects.conf from the DSP Manager
source is used.

Change-Id: I6fc7ea3e2c947bebe2e235f6abf5d85f51e19d06
Signed-off-by: John Cintron <johnathancintron@gmail.com>
tuna: add option to calibrate accelerometer

The user can put his/her device on a flat surface and calibrate
their accelerometer.
This preference requires the commit:
http://review.cyanogenmod.org/#/c/30934/

Change-Id: I078f70782c471c1e49df44af3391e1938c3d522b