Fix truncated stave in multi-stave tests. Remove all clefs.
Fix truncated stave in multi-stave tests. Remove all clefs.

Beaming is clef agnostic -- they provide no value to these tests.

Huji/vexflow,Tails/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,Silverwolf90/vexflow,Tails/vexflow,aaronmars/vexflow,Huji/vexflow,Huji/vexflow,Tails/vexflow,aaronmars/vexflow,Silverwolf90/vexflow