Clean up unused constant globals

chrome/browser/ui/gtk/extensions/extension_uninstall_dialog_gtk.cc

 // Copyright (c) 2012 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.
 //
 // Currently this file is only used for the uninstall prompt. The install prompt
 // code is in extension_install_prompt2_gtk.cc.
 
 #include "chrome/browser/extensions/extension_uninstall_dialog.h"
 
 #include <gtk/gtk.h>
 
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 #include "chrome/common/extensions/extension.h"
 #include "grit/generated_resources.h"
 #include "ui/base/gtk/gtk_hig_constants.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/gtk_util.h"
 
 namespace {
 
-// Left or right margin.
-const int kPanelHorizMargin = 13;
-
 // GTK implementation of the uninstall dialog.
 class ExtensionUninstallDialogGtk : public ExtensionUninstallDialog {
  public:
   ExtensionUninstallDialogGtk(Profile* profile,
                               Browser* browser,
                               Delegate* delegate);
   virtual ~ExtensionUninstallDialogGtk() OVERRIDE;
 
  private:
   virtual void Show() OVERRIDE;
@@ skipping 87 matching lines @@
 }
 
 }  // namespace
 
 // static
 // Platform specific implementation of the uninstall dialog show method.
 ExtensionUninstallDialog* ExtensionUninstallDialog::Create(
     Profile* profile, Browser* browser, Delegate* delegate) {
   return new ExtensionUninstallDialogGtk(profile, browser, delegate);
 }