EDK: Remove MOJO_SYSTEM_IMPL_EXPORT, system_impl_export.h, etc.

mojo/edk/system/transport_data.h

Index: mojo/edk/system/transport_data.h
diff --git a/mojo/edk/system/transport_data.h b/mojo/edk/system/transport_data.h
index 295a5a136d5e5ec815668bf948cfd5ec1d792ad9..fb4ba6bdde2f100559cfeb81450ff35fa56fe6a6 100644
--- a/mojo/edk/system/transport_data.h
+++ b/mojo/edk/system/transport_data.h
@@ -14,7 +14,6 @@
 #include "mojo/edk/embedder/platform_handle.h"
 #include "mojo/edk/embedder/platform_handle_vector.h"
 #include "mojo/edk/system/dispatcher.h"
-#include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
@@ -72,7 +71,7 @@ class Channel;
 //     the application the data payload and these handles.
 //
 // TODO(vtl): Everything above involving |PlatformHandle|s.
-class MOJO_SYSTEM_IMPL_EXPORT TransportData {
+class TransportData {
  public:
   // The maximum size of a single serialized dispatcher. This must be a multiple
   // of |kMessageAlignment|.