remove unused nspin generalization

basis/generalizations/generalizations-docs.factor

@@ -338,12 +338,6 @@ HELP: ntuck
 }
 { $description "A generalization of " { $link tuck } " that can work for any stack depth. The top item will be copied and placed " { $snippet "n" } " items down on the stack." } ;
 
-HELP: nspin
-{ $values
-    { "n" integer }
-}
-{ $description "A generalization of " { $link spin } " that can work for any stack depth. The top " { $snippet "n" } " items will be reversed in order." } ;
-
 ARTICLE: "sequence-generalizations" "Generalized sequence operations"
 { $subsections
     narray
@@ -364,7 +358,6 @@ ARTICLE: "shuffle-generalizations" "Generalized shuffle words"
     nnip
     ndrop
     ntuck
-    nspin
     mnswap
     nweave
 } ;

basis/generalizations/generalizations-tests.factor

@@ -26,8 +26,6 @@ IN: generalizations.tests
 { 0 } [ 0 1 2 3 4 4 ndrop ] unit-test
 [ [ 1 ] 5 ndip ] must-infer
 [ 1 2 3 4 ] [ 2 3 4 [ 1 ] 3 ndip ] unit-test
-[ 5 nspin ] must-infer
-[ 1 5 4 3 2 ] [ 1 2 3 4 5 4 nspin ] unit-test
 
 [ 1 2 3 4 5 [ drop drop drop drop drop 2 ] 5 nkeep ] must-infer
 [ 1 2 3 4 5 2 '[ drop drop drop drop drop _ ] 5 nkeep ] must-infer

basis/generalizations/generalizations.factor

@@ -139,6 +139,3 @@ MACRO: nbi-curry ( n -- )
 
 : nappend ( n -- seq ) narray concat ; inline
 
-MACRO: nspin ( n -- )
-    [ [ ] ] swap [ swap [ ] curry compose ] n*quot [ call ] 3append ;
-