diff --git a/ls.rb b/ls.rb
index d2e56a7..020c261 100644
--- a/ls.rb
+++ b/ls.rb
@@ -5,24 +5,6 @@ require 'etc'
 
 COLUMNS = 3
 MARGIN = 3
-PERMISSION = {
-  '0' => '---',
-  '1' => '--x',
-  '2' => '-w-',
-  '3' => '-wx',
-  '4' => 'r--',
-  '5' => 'r-x',
-  '6' => 'rw-',
-  '7' => 'rwx'
-}.freeze
-FILETYPE = {
-  '1' => 'p',
-  '2' => 'c',
-  '4' => 'd',
-  '6' => 'b',
-  '10' => '-',
-  '12' => 'l'
-}.freeze
 
 def run
   listed_filenames = list_filenames