Delete all log messages depending on system_wrappers.

webrtc/modules/audio_coding/neteq/delay_manager.cc

Index: webrtc/modules/audio_coding/neteq/delay_manager.cc
diff --git a/webrtc/modules/audio_coding/neteq/delay_manager.cc b/webrtc/modules/audio_coding/neteq/delay_manager.cc
index bc27bd1552ea27df44000667c5e8f50cc804533c..66e65095fef992ff2b8f8be7f06f280aada10467 100644
--- a/webrtc/modules/audio_coding/neteq/delay_manager.cc
+++ b/webrtc/modules/audio_coding/neteq/delay_manager.cc
@@ -19,7 +19,6 @@
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 #include "webrtc/modules/audio_coding/neteq/delay_peak_detector.h"
 #include "webrtc/modules/include/module_common_types.h"
-#include "webrtc/system_wrappers/include/logging.h"
 
 namespace webrtc {
 
@@ -295,7 +294,6 @@ int DelayManager::CalculateTargetLevel(int iat_packets) {
 
 int DelayManager::SetPacketAudioLength(int length_ms) {
   if (length_ms <= 0) {
-    LOG_F(LS_ERROR) << "length_ms = " << length_ms;
     return -1;
   }
   packet_len_ms_ = length_ms;
@@ -345,7 +343,6 @@ void DelayManager::ResetPacketIatCount() {
 // class. They are computed from |target_level_| and used for decision making.
 void DelayManager::BufferLimits(int* lower_limit, int* higher_limit) const {
   if (!lower_limit || !higher_limit) {
-    LOG_F(LS_ERROR) << "NULL pointers supplied as input";
     assert(false);
     return;
   }