Remove MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE

mojo/public/c/system/message_pipe.h

Index: mojo/public/c/system/message_pipe.h
diff --git a/mojo/public/c/system/message_pipe.h b/mojo/public/c/system/message_pipe.h
index 8c5c215eafa4c8a19a02045021d8e5fa446ecda0..66faf656be3f1184fab6fe3a8ebc20fa69d0284a 100644
--- a/mojo/public/c/system/message_pipe.h
+++ b/mojo/public/c/system/message_pipe.h
@@ -23,23 +23,15 @@
 //   |MojoCreateMessagePipeOptionsFlags flags|: Used to specify different modes
 //       of operation.
 //       |MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_NONE|: No flags; default mode.
-//       |MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE|: The message pipe
-//           can be sent over another pipe after it's been read, written or
-//           waited. This mode makes message pipes use more resources (one OS
-//           pipe each), so only specify if this functionality is required.
 
 typedef uint32_t MojoCreateMessagePipeOptionsFlags;
 
 #ifdef __cplusplus
 const MojoCreateMessagePipeOptionsFlags
     MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_NONE = 0;
-const MojoCreateMessagePipeOptionsFlags
-    MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE = 1;
 #else
 #define MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_NONE \
   ((MojoCreateMessagePipeOptionsFlags)0)
-#define MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE \
-  ((MojoCreateMessagePipeOptionsFlags)1)
 #endif
 
 MOJO_STATIC_ASSERT(MOJO_ALIGNOF(int64_t) == 8, "int64_t has weird alignment");