Revert "Move mojo edk into mojo/edk"

mojo/system/data_pipe_unittest.cc

Index: mojo/system/data_pipe_unittest.cc
diff --git a/mojo/edk/system/data_pipe_unittest.cc b/mojo/system/data_pipe_unittest.cc
similarity index 99%
rename from mojo/edk/system/data_pipe_unittest.cc
rename to mojo/system/data_pipe_unittest.cc
index 8d2e4eb038efee84bc5afa95019bf7f1f23ab8bb..bbdafe9d762a4296f6d5afa8186e57f67f8dbe19 100644
--- a/mojo/edk/system/data_pipe_unittest.cc
+++ b/mojo/system/data_pipe_unittest.cc
@@ -2,14 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "mojo/edk/system/data_pipe.h"
+#include "mojo/system/data_pipe.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <limits>
 
-#include "mojo/edk/system/constants.h"
+#include "mojo/system/constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {