Always prefer default tap.

Library/Homebrew/cask/cask_loader.rb

@@ -458,19 +458,12 @@ module Cask
         when 1
           loaders.first
         when 2..Float::INFINITY
-          default_tap_loaders, other_loaders = *loaders.partition { _1.tap.core_cask_tap? }
+          # Always prefer the default tap, i.e. behave the same as if loading from the API.
-          default_tap_loader = default_tap_loaders.first if default_tap_loaders.count
+          if (default_tap_loader = loaders.find { _1.tap.core_cask_tap? })
+            return default_tap_loader
+          end
 
-          # Put default tap last so that the error message always recommends
+          raise TapCaskAmbiguityError.new(token, loaders.map(&:tap))
-          # using the fully-qualified name for non-default taps.
-          taps = other_loaders.map(&:tap) + default_tap_loaders.map(&:tap)
-
-          error = TapCaskAmbiguityError.new(token, taps)
-
-          raise error unless default_tap_loader
-
-          opoo error if warn
-          default_tap_loader
         end
       end
     end