models: drop various unused #named methods.

app/models/artist.rb

@@ -464,10 +464,6 @@ class Artist < ApplicationRecord
   end
 
   module SearchMethods
-    def named(name)
-      where(name: normalize_name(name))
-    end
-
     def any_other_name_matches(regex)
       where(id: Artist.from("unnest(other_names) AS other_name").where("other_name ~ ?", regex))
     end

app/models/tag.rb

@@ -930,10 +930,6 @@ class Tag < ApplicationRecord
       where("tags.name LIKE ? ESCAPE E'\\\\'", normalize_name(name).to_escaped_for_sql_like)
     end
 
-    def named(name)
-      where("tags.name = ?", TagAlias.to_aliased([name]).join(""))
-    end
-
     def search(params)
       q = super
 

app/models/user.rb

@@ -742,10 +742,6 @@ class User < ApplicationRecord
   end
 
   module SearchMethods
-    def named(name)
-      where("lower(name) = ?", name)
-    end
-
     def admins
       where("level = ?", Levels::ADMIN)
     end