diff --git a/Library/Homebrew/development_tools.rb b/Library/Homebrew/development_tools.rb
index ea7f5837d0..bee2b86dea 100644
--- a/Library/Homebrew/development_tools.rb
+++ b/Library/Homebrew/development_tools.rb
@@ -119,10 +119,6 @@ class DevelopmentTools
       @clang_version = @clang_build_version = nil
       @non_apple_gcc_version = {}
     end
-
-    def tar_supports_xz?
-      false
-    end
   end
 end
 
diff --git a/Library/Homebrew/extend/os/mac/development_tools.rb b/Library/Homebrew/extend/os/mac/development_tools.rb
index 7c97b9d69e..381b26e661 100644
--- a/Library/Homebrew/extend/os/mac/development_tools.rb
+++ b/Library/Homebrew/extend/os/mac/development_tools.rb
@@ -76,9 +76,5 @@ class DevelopmentTools
         end
       end
     end
-
-    def tar_supports_xz?
-      false
-    end
   end
 end