Emitted to remove all occurrences of
tag from a range of text in a `GtkTextBuffer`.
Removal actually occurs in the default handler.
Note that if your handler runs before the default handler it must not invalidate the
end iters (or has to
See also: [method@Gtk.TextBuffer.remove_tag].
the tag to be removed
the start of the range the tag is removed from
the end of the range the tag is removed from