Remove some unused functions in core

Source/core/editing/EditCommand.h

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 38 matching lines @@
     virtual bool isSimpleEditCommand() const { return false; }
     virtual bool isCompositeEditCommand() const { return false; }
     bool isTopLevelCommand() const { return !m_parent; }
 
     virtual void doApply() = 0;
 
     virtual void trace(Visitor*);
 
 protected:
     explicit EditCommand(Document&);
-    EditCommand(Document*, const VisibleSelection&, const VisibleSelection&);
 
     Document& document() const { return *m_document.get(); }
     CompositeEditCommand* parent() const { return m_parent; }
     void setStartingSelection(const VisibleSelection&);
-    void setStartingSelection(const VisiblePosition&);
     void setEndingSelection(const VisibleSelection&);
     void setEndingSelection(const VisiblePosition&);
 
 private:
     RefPtrWillBeMember<Document> m_document;
     VisibleSelection m_startingSelection;
     VisibleSelection m_endingSelection;
     RawPtrWillBeMember<CompositeEditCommand> m_parent;
 };
 
@@ skipping 12 matching lines @@
 
 private:
     virtual bool isSimpleEditCommand() const override final { return true; }
 };
 
 DEFINE_TYPE_CASTS(SimpleEditCommand, EditCommand, command, command->isSimpleEditCommand(), command.isSimpleEditCommand());
 
 } // namespace blink
 
 #endif // EditCommand_h