dlx: cleanup: remove unused files

Keylayouts/IDC: removed keylayouts and idc files that are already
provided by AOSP in frameworks/base/data/keyboards.

This makes lunch and mka ... less noisy.

Change-Id: I10cc0cb03d5c08a0e266148b5d26398f263bee19
Merge branch 'cm-11.0' into kk_mkt