Your bug report

#68050: 29.1; Pixel scroll doesn't work on platforms that do not expose device-class.

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 68050@debbugs.gnu.org.

-- 
68050: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=68050
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