Revert "[classifyTools] 'sorted' keyword argument should be boolean"
Revert "[classifyTools] 'sorted' keyword argument should be boolean"

This reverts commit 34d43aa797c8b9e4ff42782bfdd7abde7711835d.

See https://github.com/behdad/fonttools/commit/34d43aa797c8b9e4ff42782bfdd7abde7711835d#commitcomment-17012817

googlefonts/fonttools,fonttools/fonttools