henrik.lundin 061b79af60 ACM: Remove functions related to DTMF
The functions were essentially no-op. Also removing forward declaration
of ACMDTMFDetection, which was not used.

BUG=3520

Review URL: https://codereview.webrtc.org/1356543003

Cr-Commit-Position: refs/heads/master@{#9982}
2015-09-18 08:29:17 +00:00
..