You can easily create a List Filter containing all the glyphs you wish to delete. Once you’ve set up the filter, simply select it, choose all the glyphs within, and then delete them.
@GeorgSeifert
many legacy wrong mapped files that have many glyphs to be removed
each group of these fonts have the same set of removal-targeted glyphs
then I will leave the basic shapes from which other glyphs can be generated via composite / decompose contents
If you can also make a list of all glyphs that you like to keep. Select all and assign a color. Then have a second smart filter that shows all glyphs that don’t have the color label and then delete those.