diff --git a/main.rkt b/main.rkt
index 911ff8c..3c1e217 100644
--- a/main.rkt
+++ b/main.rkt
@@ -10,7 +10,6 @@
   "misc.rkt"
   "string.rkt"
   "len.rkt"
-  "tree.rkt"
   "values.rkt")
 
 (provide 
@@ -24,5 +23,4 @@
   "misc.rkt"
   "string.rkt"
   "len.rkt"
-  "tree.rkt"
   "values.rkt"))
\ No newline at end of file
diff --git a/tests.rkt b/tests.rkt
index e2ea756..55162b0 100644
--- a/tests.rkt
+++ b/tests.rkt
@@ -98,19 +98,6 @@
 (check-equal? (filter-split '(1 2 3 4 5 6) even?) '((1)(3)(5)))
 
 
-(check-equal? (filter-tree string? '(p)) null)
-(check-equal? (filter-tree string? '(p "foo" "bar")) '("foo" "bar"))
-(check-equal? (filter-tree string? '(p "foo" (p "bar"))) '("foo" ("bar")))
-(check-equal? (filter-tree (λ(i) (and (string? i) (equal? i "\n"))) '("\n" (foo "bar") "\n")) '("\n" "\n"))
-(check-equal? (filter-not-tree string? '(p)) '(p))
-(check-equal? (filter-not-tree string? '(p "foo" "bar")) '(p))
-(check-equal? (filter-not-tree string? '(p "foo" (p "bar"))) '(p (p)))
-;(check-equal? (filter-tree (λ(i) (and (tagged-xexpr? i) (equal? 'em (car i)))) '(p "foo" (em "bar"))) '(p "foo"))
-
-(check-equal? (map-tree (λ(i) (if (number? i) (* 2 i) i)) '(p 1 2 3 (em 4 5))) '(p 2 4 6 (em 8 10)))
-(check-equal? (map-tree (λ(i) (if (symbol? i) 'foo i)) '(p 1 2 3 (em 4 5))) '(foo 1 2 3 (foo 4 5)))
-
-
 (define foo-path-strings '("foo" "foo.txt" "foo.bar" "foo.bar.txt"))
 (define-values (foo-path foo.txt-path foo.bar-path foo.bar.txt-path) 
   (apply values (map ->path foo-path-strings)))
diff --git a/tree.rkt b/tree.rkt
deleted file mode 100644
index 0a12d3b..0000000
--- a/tree.rkt
+++ /dev/null
@@ -1,31 +0,0 @@
-#lang racket/base
-(require "define.rkt")
-
-(module+ test (require rackunit))
-
-(define+provide/contract (filter-tree proc tree)
-  (procedure? list? . -> . list?)
-  (define (remove-empty x)
-    (cond
-      [(list? x) (filter (compose1 not null?) (map remove-empty x))]
-      [else x]))
-  
-  (define (filter-tree-inner proc x)
-    (cond
-      [(list? x) (map (λ(i) (filter-tree-inner proc i)) x)]
-      [else (if (proc x) x null)]))
-  
-  (remove-empty (filter-tree-inner proc tree)))
- 
-
-(define+provide/contract (filter-not-tree proc tree)
-  (procedure? list? . -> . list?)
-  (filter-tree (λ(i) (not (proc i))) tree))
-
-
-(define+provide/contract (map-tree proc tree)
-  (procedure? list? . -> . list?)
-  (cond 
-    [(list? tree) (map (λ(i) (map-tree proc i)) tree)]
-    [else (proc tree)]))
-