sound: Remove the since deleted dummy.c sound driver from the Makefile.

The file itself had been deleted, but it was still in the Makefile.

BUG=None
TEST=Built for pit.
BRANCH=None

Change-Id: I7a384943dff40354e0e6604300c82362ec9060e0
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/64880
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
1 file changed
tree: 617c277c0679cf0ca6d90beca990b9552d34826c
  1. board/
  2. src/
  3. util/
  4. .gitignore
  5. Kconfig
  6. Makefile
  7. Makefile.inc
  8. PRESUBMIT.cfg