remove the 'Unsupported Modules' meta module

unsupported/Eigen/ArpackSupport

@@ -1,3 +1,11 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 #ifndef EIGEN_ARPACKSUPPORT_MODULE_H
 #define EIGEN_ARPACKSUPPORT_MODULE_H
 
@@ -5,17 +13,12 @@
 
 #include <Eigen/src/Core/util/DisableStupidWarnings.h>
 
-/** \defgroup Eigenvalues_Module Eigenvalues module
+/** \defgroup ArpackSupport_Module Arpack support module
   *
-  *
-  *
-  * This module mainly provides various eigenvalue solvers.
-  * This module also provides some MatrixBase methods, including:
-  *  - MatrixBase::eigenvalues(),
-  *  - MatrixBase::operatorNorm()
+  * This module provides a wrapper to Arpack, a library for sparse eigenvalue decomposition.
   *
   * \code
-  * #include <Eigen/Eigenvalues>
+  * #include <Eigen/ArpackSupport>
   * \endcode
   */