Remove iceRegatherIntervalRange

This was an ICE configuration experiment added a couple years ago that did not end up being used.

Bug: webrtc:11316
Change-Id: Iafb7e1c4f7b4598815f045808dbf6e470172f119
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/167680
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Qingsi Wang <qingsi@webrtc.org>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30395}
diff --git a/rtc_base/async_packet_socket.h b/rtc_base/async_packet_socket.h
index 50c07e2..d47d57b 100644
--- a/rtc_base/async_packet_socket.h
+++ b/rtc_base/async_packet_socket.h
@@ -11,6 +11,8 @@
 #ifndef RTC_BASE_ASYNC_PACKET_SOCKET_H_
 #define RTC_BASE_ASYNC_PACKET_SOCKET_H_
 
+#include <vector>
+
 #include "rtc_base/constructor_magic.h"
 #include "rtc_base/dscp.h"
 #include "rtc_base/network/sent_packet.h"