Merge pull request #17020 from bangerth/zap-16b

Zap step-16b.

doc/doxygen/headers/mg.h

@@ -41,7 +41,7 @@
  * Finally, we have several auxiliary classes, namely MGLevelObject,
  * which stores an object on each level*
  *
- * See the step-16, step-16b, and step-39 example programs on how to use this
+ * See the step-16 and step-39 example programs on how to use this
  * functionality.
 
  * <h3>Multigrid and hanging nodes</h3>

doc/doxygen/tutorial/tutorial.h.in

@@ -237,12 +237,6 @@
  *       </td></tr>
  *
  *   <tr valign="top">
- *       <td>step-16b</td>
- *       <td> A variant of step-16 but with MeshWorker for assembly: Multigrid
- *       preconditioning of the Laplace equation on adaptive meshes.
- *       </td></tr>
- *
- *   <tr valign="top">
  *       <td>step-17</td>
  *       <td> Using PETSc for linear algebra; running
  *       in parallel on clusters of computers linked together by MPI.
@@ -1107,7 +1101,6 @@
  *     </td>
  *     <td>
  *       step-16,
- *       step-16b
  *       step-31,
  *       step-32,
  *       step-37,

examples/step-16/doc/intro.dox

@@ -1,10 +1,5 @@
 <br>
 
-<i> Note: A variant called step-16b of this tutorial exists, that uses
-MeshWorker and LocalIntegrators instead of assembling matrices manually as it
-is done in this tutorial.
-</i>
-
 <a name="step-16-Intro"></a>
 <h1>Introduction</h1>