clear asm code and unused functions in audio processing module
clear asm code and unused functions in audio processing module

BUG=
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/25119004

Patch from Zhongwei Yao <zhongwei.yao@arm.com>.

git-svn-id: 03ae4fbe531b1eefc9d815f31e49022782c42458@7671 4adac7df-926f-26a2-2b94-8c16560cd09d

PersonifyInc/chromium_webrtc,jchavanton/webrtc,jchavanton/webrtc,PersonifyInc/chromium_webrtc,PersonifyInc/chromium_webrtc,Alkalyne/webrtctrunk,krieger-od/nwjs_chromium_webrtc,aleonliao/webrtc-trunk,jchavanton/webrtc,krieger-od/webrtc,sippet/webrtc,PersonifyInc/chromium_webrtc,PersonifyInc/chromium_webrtc,krieger-od/nwjs_chromium_webrtc,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,jchavanton/webrtc,krieger-od/webrtc,aleonliao/webrtc-trunk,krieger-od/nwjs_chromium_webrtc,krieger-od/nwjs_chromium_webrtc,krieger-od/nwjs_chromium_webrtc,Alkalyne/webrtctrunk,krieger-od/webrtc,PersonifyInc/chromium_webrtc,aleonliao/webrtc-trunk,aleonliao/webrtc-trunk,aleonliao/webrtc-trunk,sippet/webrtc,jchavanton/webrtc,sippet/webrtc,krieger-od/webrtc,sippet/webrtc,krieger-od/nwjs_chromium_webrtc,aleonliao/webrtc-trunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,sippet/webrtc,Alkalyne/webrtctrunk,jchavanton/webrtc,sippet/webrtc,krieger-od/webrtc,Alkalyne/webrtctrunk,krieger-od/webrtc,jchavanton/webrtc