Headers shouldn't include themselves.

Cycles break tools such as include-what-you-use.

Bug: webrtc:9855
Change-Id: I8afbfda5b43b948c4e94def2a752340a3314f4cd
Reviewed-on: https://webrtc-review.googlesource.com/c/105481
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Yves Gerey <yvesg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25131}
diff --git a/modules/rtp_rtcp/include/flexfec_sender.h b/modules/rtp_rtcp/include/flexfec_sender.h
index 12277e1..fbe35ce 100644
--- a/modules/rtp_rtcp/include/flexfec_sender.h
+++ b/modules/rtp_rtcp/include/flexfec_sender.h
@@ -18,7 +18,6 @@
 #include "api/array_view.h"
 #include "api/rtpparameters.h"
 #include "modules/include/module_common_types.h"
-#include "modules/rtp_rtcp/include/flexfec_sender.h"
 #include "modules/rtp_rtcp/include/rtp_header_extension_map.h"
 #include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "modules/rtp_rtcp/source/rtp_header_extension_size.h"