Revert "Move mojo edk into mojo/edk"

mojo/go/system/impl/core_impl.go

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package impl
+package impl;
 
 /*
 #include "mojo/public/platform/native/system_thunks.h"
 */
 import "C"
-import "mojo/public/go/mojo/edk/system"
+import "mojo/public/go/mojo/system"
+
 
 type CoreImpl struct {
 }
 
 func (c CoreImpl) GetTimeTicksNow() int64 {
-        return (int64)(C.MojoGetTimeTicksNow())
+        return (int64)(C.MojoGetTimeTicksNow());
 }
 
-var lazyInstance *CoreImpl = nil
+var lazyInstance *CoreImpl = nil;
 
 func GetCore() system.Core {
         if lazyInstance == nil {
-                lazyInstance = new(CoreImpl)
+                lazyInstance = new(CoreImpl);
         }
-        return lazyInstance
+        return lazyInstance;
 }