Fix duplicate paragraph

Author: smnandre

src/Icons/doc/index.rst

@@ -164,12 +164,6 @@ If you already have the SVG icon files to use in your project, store them in the
 *name* of the icon (``icon_name.svg`` will be named ``icon_name``). If located in
 a subdirectory, the *name* will be ``subdirectory:icon_name``.
 
-On-Demand Open Source Icons
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Add your SVG icons to the ``assets/icons/`` directory and commit them.
-The name of the file is used as the *name* of the icon (``name.svg`` will be named ``name``).
-If located in a subdirectory, the *name* will be ``sub-dir:name``.
-
 .. code-block:: text
 
     your-project/