diff --git a/Library/Homebrew/cask/audit.rb b/Library/Homebrew/cask/audit.rb
index 8a5d0b53db..0d762b2a41 100644
--- a/Library/Homebrew/cask/audit.rb
+++ b/Library/Homebrew/cask/audit.rb
@@ -282,10 +282,6 @@ module Cask
                       [
                         %r{\Ahttps://sourceforge\.net/projects/[^/]+/files/latest/download\Z},
                         %r{\Ahttps://downloads\.sourceforge\.net/(?!(project|sourceforge)\/)},
-                        # special cases: cannot find canonical format URL
-                        %r{\Ahttps?://brushviewer\.sourceforge\.net/brushviewql\.zip\Z},
-                        %r{\Ahttps?://doublecommand\.sourceforge\.net/files/},
-                        %r{\Ahttps?://excalibur\.sourceforge\.net/get\.php\?id=},
                       ])
     end