Remove ShutdownIPCSupportAndWaitForNoChannels.

mojo/edk/embedder/embedder.h

Index: mojo/edk/embedder/embedder.h
diff --git a/mojo/edk/embedder/embedder.h b/mojo/edk/embedder/embedder.h
index 5ba244990dfadceb06ebaa72a5555ffff89645b3..a96c6102967e8024f18af7ecbdd440266a8f28f5 100644
--- a/mojo/edk/embedder/embedder.h
+++ b/mojo/edk/embedder/embedder.h
@@ -115,11 +115,6 @@ MOJO_SYSTEM_IMPL_EXPORT void ShutdownIPCSupportOnIOThread();
 // |OnShutdownComplete()|.
 MOJO_SYSTEM_IMPL_EXPORT void ShutdownIPCSupport();
 
-// Like above, but doesn't call |OnShutdownComplete| until all channels are
-// gone.
-// TODO(jam): this should be the default behavior.
-MOJO_SYSTEM_IMPL_EXPORT void ShutdownIPCSupportAndWaitForNoChannels();
-
 // Creates a message pipe from a platform handle. Safe to call from any thread.
 MOJO_SYSTEM_IMPL_EXPORT ScopedMessagePipeHandle
 CreateMessagePipe(ScopedPlatformHandle platform_handle);