Revert of Update mojo sdk to rev afb4440fd5a10cba980878c326180b7ad7960480

mojo/edk/system/channel_info.cc

Index: mojo/edk/system/channel_info.cc
diff --git a/mojo/edk/system/channel_info.cc b/mojo/edk/system/channel_info.cc
index 6d23215e905f1d60decf281a8644431ed22aeaec..efc5f0409161f51466b3189a9817e936ca936f6f 100644
--- a/mojo/edk/system/channel_info.cc
+++ b/mojo/edk/system/channel_info.cc
@@ -3,8 +3,6 @@
 // found in the LICENSE file.
 
 #include "mojo/edk/system/channel_info.h"
-
-#include <algorithm>
 
 namespace mojo {
 namespace system {
@@ -21,11 +19,5 @@
 ChannelInfo::~ChannelInfo() {
 }
 
-void ChannelInfo::Swap(ChannelInfo* other) {
-  // Note: Swapping avoids refcount churn.
-  std::swap(channel, other->channel);
-  std::swap(channel_thread_task_runner, other->channel_thread_task_runner);
-}
-
 }  // namespace system
 }  // namespace mojo