Merge pull request matplotlib#16698 from anntzer/toolkitsdocs

Small edits to toolkits docs.

Author: story645

doc/api/index.rst

@@ -132,9 +132,13 @@ Toolkits
 Matplotlib. The following toolkits are included:
 
 .. toctree::
-   :maxdepth: 1
+   :hidden:
 
    toolkits/index.rst
+
+.. toctree::
+   :maxdepth: 1
+
    toolkits/mplot3d.rst
    toolkits/axes_grid1.rst
    toolkits/axisartist.rst

doc/api/toolkits/index.rst

@@ -26,8 +26,6 @@ information.
    :align: center
    :scale: 50
 
-   Contourf3d 2
-
 .. toctree::
     :maxdepth: 2
 

doc/api/toolkits/mplot3d.rst

@@ -5,7 +5,7 @@ mplot3d API
 ***********
 
 .. contents::
-      :backlinks: none
+   :backlinks: none
 
 .. automodule:: mpl_toolkits.mplot3d
    :no-members:
@@ -70,15 +70,6 @@ mplot3d API
    art3d.PathPatch3D
    art3d.Poly3DCollection
    art3d.Text3D
-
-
-Art3D Utility Functions
-=======================
-
-.. autosummary::
-   :toctree: ../_as_gen
-   :template: autosummary.rst
-
    art3d.get_dir_vector
    art3d.juggle_axes
    art3d.line_2d_to_3d