Revert "[merge] Fix for ClassDef.Format and Coverage.Format"
Revert "[merge] Fix for ClassDef.Format and Coverage.Format"

This reverts commit 53d78d9956dbbfe50395bf8002b0308b375c02a9.

Now that Format is back in, merge it.

Should fix https://github.com/fonttools/fonttools/pull/878

googlefonts/fonttools,fonttools/fonttools