Remove some streams from rtc_base/

Bug: webrtc:8982
Change-Id: Id372dde980fae493debf20873b6aeee8a7f1b045
Reviewed-on: https://webrtc-review.googlesource.com/78781
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23396}
diff --git a/rtc_base/logsinks.cc b/rtc_base/logsinks.cc
index 5f64f62..229b542 100644
--- a/rtc_base/logsinks.cc
+++ b/rtc_base/logsinks.cc
@@ -10,7 +10,7 @@
 
 #include "rtc_base/logsinks.h"
 
-#include <iostream>
+#include <cstdio>
 #include <string>
 
 #include "rtc_base/checks.h"
@@ -37,7 +37,7 @@
 
 void FileRotatingLogSink::OnLogMessage(const std::string& message) {
   if (stream_->GetState() != SS_OPEN) {
-    std::cerr << "Init() must be called before adding this sink." << std::endl;
+    std::fprintf(stderr, "Init() must be called before adding this sink.\n");
     return;
   }
   stream_->WriteAll(message.c_str(), message.size(), nullptr, nullptr);