Remove leaking \small from \drumgrace

If needed, this could be replaced with a \magnifyStaff 9/10 in the
 future. But it was barely useful in the few tests I did.

Instead let's leave this to lilypond.
'Cause, you know, lilypond is cool! :-)

lib/embellishments.ily

@@ -12,7 +12,10 @@ drumgrace = #(define-music-function (parser location notes ) ( ly:music? ) #{
 	\override Score.Stem #'beamlet-max-length-proportion = #'(0.5 . 0.5)
 
 	% Print notes
-	\small \times 1/4 { \grace $notes }
+	% Grace note timing is scaled, so they do not wander off too
+	% much when combined with pipeband embellishments in a full
+	% score.
+	\times 1/4 { \grace $notes }
 
 	% Revert back
 	\revert Score.Stem #'beamlet-default-length