Constant error messages for projects that do not use jupytext

In some of my projects I do not use notebooks, and so jupytext is not installed in those virtual environments. (Other projects do use jupytext.) If this extension is installed, when I look at those projects that do not use jupytext, I get a constant stream of popups informing me that the extension cannot find a jupytext executable to run. This is intrusive and unhelpful.

One option would be for the extension to include a bundled version of jupytext, presumably to be overridden by the configured python environment if there is one. An alternative would be to use the same python interpreter that the notebook or python file uses (notebooks, at least, must have a kernel selected to function). If jupytext is not available in that interpreter, just do nothing.