Cleanup after talk/media move.

More work remains, but is less urgent.
webrtc/media/base/mediacommon.h could not be deleted since
the constants are used in multiple places.

BUG=webrtc:5420
TBR=pthatcher@webrtc.org

Review URL: https://codereview.webrtc.org/1688753002 .

Cr-Commit-Position: refs/heads/master@{#11551}

talk/media/testdata/faces.1280x720_P420.yuv

diff --git a/talk/media/testdata/faces.1280x720_P420.yuv b/talk/media/testdata/faces.1280x720_P420.yuv
deleted file mode 100644
index f4844ee..0000000
--- a/talk/media/testdata/faces.1280x720_P420.yuv
+++ /dev/null
Binary files differ

webrtc/media/base/mutedvideocapturer.cc

diff --git a/webrtc/media/base/mutedvideocapturer.cc b/webrtc/media/base/mutedvideocapturer.cc
deleted file mode 100644
index f122c30..0000000
--- a/webrtc/media/base/mutedvideocapturer.cc
+++ /dev/null
@@ -1,2 +0,0 @@
-// TODO(pthatcher): Delete this file.  Pulse won't work without it for
-// some reason.