DEV: Remove custom field regexes (#24390)

As far as I can tell, this isn't used

app/models/concerns/has_custom_fields.rb

@@ -18,10 +18,6 @@ module HasCustomFields
     def self.get_custom_field_type(types, key)
       return unless types
 
-      sorted_types = types.keys.select { |k| k.end_with?("*") }.sort_by(&:length).reverse
-
-      sorted_types.each { |t| return types[t] if key =~ /\A#{t}/i }
-
       types[key]
     end