Remove unused RtpStatistics struct.

This unused struct is basically a copy of RtcpStatistics in
webrtc/common_types.h. I expect this wasn't properly removed when that
one was added.

R=tommi@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/25239004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7758 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/config.h b/webrtc/config.h
index ee1097f..7da7093 100644
--- a/webrtc/config.h
+++ b/webrtc/config.h
@@ -21,18 +21,6 @@
 
 namespace webrtc {
 
-struct RtpStatistics {
-  RtpStatistics()
-      : ssrc(0),
-        fraction_loss(0),
-        cumulative_loss(0),
-        extended_max_sequence_number(0) {}
-  uint32_t ssrc;
-  int fraction_loss;
-  int cumulative_loss;
-  int extended_max_sequence_number;
-};
-
 struct SsrcStats {
   SsrcStats()
       : key_frames(0),