remove unused frac code, re #639

Author: rsms

src/features/frac.fea

@@ -34,18 +34,6 @@
   eight.dnom
   nine.dnom
 ];
-@subscripts = [
-  zero.subs
-  one.subs
-  two.subs
-  three.subs
-  four.subs
-  five.subs
-  six.subs
-  seven.subs
-  eight.subs
-  nine.subs
-];
 
 lookup FractionBar {
   ignore sub slash @figures @figures @figures @figures @figures @figures @figures @figures @figures @figures slash';
@@ -143,4 +131,4 @@ lookup Denominator {
   sub [fraction @denominators onefraction] @figures' by @denominators;
 } Denominator;
 
-sub @figures space' @numerators by thinspace;
+sub @figures space' @numerators by thinspace;