specialized-arrays: don't define useless empty T-sequence mixin

basis/specialized-arrays/specialized-arrays.factor

@@ -30,7 +30,6 @@ M: bad-byte-array-length summary
 FUNCTOR: define-array ( T -- )
 
 A            DEFINES-CLASS ${T}-array
-S            DEFINES-CLASS ${T}-sequence
 <A>          DEFINES <${A}>
 (A)          DEFINES (${A})
 <direct-A>   DEFINES <direct-${A}>
@@ -46,8 +45,6 @@ SET-NTH      [ T dup c-setter array-accessor ]
 
 WHERE
 
-MIXIN: S
-
 TUPLE: A
 { underlying c-ptr read-only }
 { length array-capacity read-only } ;

basis/specialized-vectors/specialized-vectors.factor

@@ -15,7 +15,6 @@ FUNCTOR: define-vector ( T -- )
 V   DEFINES-CLASS ${T}-vector
 
 A   IS      ${T}-array
-S   IS      ${T}-sequence
 <A> IS      <${A}>
 
 >V  DEFERS >${V}
@@ -38,7 +37,6 @@ M: V pprint* pprint-object ;
 SYNTAX: V{ \ } [ >V ] parse-literal ;
 
 INSTANCE: V growable
-INSTANCE: V S
 
 ;FUNCTOR