- Remove webrtc/tools/agc/test_utils.cc/.h - only used from the above test. - Remove webrtc/tools/agc/agc_harness.cc - not used anymore. BUG=webrtc:4690 Review-Url: https://codereview.webrtc.org/2299023004 Cr-Commit-Position: refs/heads/master@{#14039}