Delete unused includes of assert.h

Bug: None
Change-Id: Iadc531710dca0ba34a00ac363bfe0784355bb6f9
Reviewed-on: https://webrtc-review.googlesource.com/c/103501
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24995}
diff --git a/examples/peerconnection/server/data_socket.cc b/examples/peerconnection/server/data_socket.cc
index 4369117..2ffc0ad 100644
--- a/examples/peerconnection/server/data_socket.cc
+++ b/examples/peerconnection/server/data_socket.cc
@@ -10,6 +10,7 @@
 
 #include "examples/peerconnection/server/data_socket.h"
 
+#include <assert.h>
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>