Delete unneeded includes of atomic32.h.

BUG=None

Review-Url: https://codereview.webrtc.org/3002173002
Cr-Original-Commit-Position: refs/heads/master@{#19484}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 821e21402d84373f790d106c1f017cd9adb8ce3d
diff --git a/video/payload_router.h b/video/payload_router.h
index 177bc07..8b51861 100644
--- a/video/payload_router.h
+++ b/video/payload_router.h
@@ -19,7 +19,6 @@
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/thread_annotations.h"
-#include "webrtc/system_wrappers/include/atomic32.h"
 
 namespace webrtc {
 
diff --git a/voice_engine/test/auto_test/standard/rtp_rtcp_test.cc b/voice_engine/test/auto_test/standard/rtp_rtcp_test.cc
index 9af0eec..9af7f86 100644
--- a/voice_engine/test/auto_test/standard/rtp_rtcp_test.cc
+++ b/voice_engine/test/auto_test/standard/rtp_rtcp_test.cc
@@ -11,7 +11,6 @@
 #include <memory>
 
 #include "webrtc/rtc_base/criticalsection.h"
-#include "webrtc/system_wrappers/include/atomic32.h"
 #include "webrtc/system_wrappers/include/event_wrapper.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/voice_engine/test/auto_test/fixtures/after_streaming_fixture.h"