Remove readline lib file from the documentation.

tscrim · tscrim · commit ed1484874b03 · 2021-07-21T09:00:50.000+10:00
diff --git a/src/doc/en/reference/libs/index.rst b/src/doc/en/reference/libs/index.rst
@@ -145,13 +145,6 @@ ratpoints
 
    sage/libs/ratpoints
 
-Readline
---------
-.. toctree::
-   :maxdepth: 2
-
-   sage/libs/readline
-
 Symmetrica
 ----------
 .. toctree::
