Cleanup: remove unused files

1. AudioBTIDnew.csv - was never named right in the first place and
   is only used by msm8660 qcom audio-caf
2. Keylayouts and input device configurations - removed those already
   provided by AOSP in frameworks/base/data/keyboards

Change-Id: I6e6c774d8a4c5a110544b685692fcc946cd4c460