remove duplicate having

Author: fredvd

docs/overview/index.md

@@ -108,7 +108,7 @@ Our documentation contains setup examples for these services, yet requires that
 (overview-6-label)=
 ## Good to know / What to know
 
-One of the key benefits of the new React-based frontend for Plone 6 is that you can now customize and theme Plone extensively using HTML, CSS, and JavaScript using up-to-date frontend technologies without having having to set up a local Python development environment.
+One of the key benefits of the new React-based frontend for Plone 6 is that you can now customize and theme Plone extensively using HTML, CSS, and JavaScript using up-to-date frontend technologies without having to set up a local Python development environment.
 The Plone backend can be run on a local developer machine in a container.
 
 Basic familiarity with programming in Python and managing Python modules and packages using `virtualenv` and `pip` is required to work on the backend code.