Remove audio files per author request

Original author Dennis Cleiren has contacted us and asked
to remove 5 audio files that were not intended to be
merged (miscommunication with codeworkx of original patches).

For reference:
http://review.cyanogenmod.org/#/c/13215/
http://review.cyanogenmod.org/#/c/16482/

Change-Id: Idad43b62f2d3fbf593b80b56ee129dd6b98e30eb