lineage: Remove external/koush/ion

* It was used in VoicePlus and some cyngn apps,
  but now it's unused, so kill it

Change-Id: I7236f22987c1d65f2f4286cf4ef4411fd70f0998
1 file changed
tree: ebe531ebe9b36c524b74f114072becf1657289ff
  1. snippets/
  2. default.xml
  3. README.mkdn