Removes unused test files by audio_processing/transient
Removes unused test files by audio_processing/transient

BUG=
TBR=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/36499004

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@7901 4adac7df-926f-26a2-2b94-8c16560cd09d

svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758,svn2github/webrtc-Revision-8758