Take care of unused code #166
Description
There's a few directories that CI doesn't touch and that are years behind by now (/chart, /python_ext, even /svg-chart to a certain extent). I doubt anyone is still using them and I suspect it would be a major undertaking to make them work with the current ext-rs API. Having said that, it looks like there's been a lot of work put into them, so I feel it would be a shame to just delete them.
The reason I'm bringing this up is because the repo currently has a bunch of vulnerabilities according to dependabot, but all of them apply to dependencies of either /chart or /python_ext. This is distracting if there are vulnerabilities in /ext or /web_ext that do need fixing