Clean the manual page titles, links and intro.

doc/C09_TutorialSparse.dox

@@ -2,13 +2,8 @@ namespace Eigen {
 
 /** \eigenManualPage TutorialSparse Sparse matrix manipulations
 
-\li \b Previous: \ref TutorialGeometry
-\li \b Next: \ref TutorialMapClass
-
 \eigeneigenAutoToc
 
-<hr>
-
 Manipulating and solving sparse problems involves various modules which are summarized below:
 
 <table class="manual">
@@ -436,8 +431,6 @@ sm2.selfadjointView<Lower>() = A.selfadjointView<Lower>().twistedBy(P);       //
   sm1.middleCols(j, nb);    // for column major matrices only, get a range of nb columns
 \endcode
 
-\li \b Next: \ref TutorialMapClass
-
 */
 
 }