Remove unused string resource ngram_category

This is a follow up change for Ib1fc608a.

Change-Id: Id53965310fa4d13739835f37e1d6facf5b654a3f
47 files changed
tree: 3f769a08578be11cf3ea56a880cc9afc33b36851
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk