Remove unused methods in GrapeSwagger::DocMethods::BuildModelDefiniti…

…on (ruby-grape#856)

Co-authored-by: peter scholz <pscholz.le@gmail.com>

lib/grape-swagger/doc_methods/build_model_definition.rb

@@ -4,14 +4,9 @@ module GrapeSwagger
   module DocMethods
     class BuildModelDefinition
       class << self
-        def build(model, properties, required, other_def_properties = {})
+        def build(_model, properties, required, other_def_properties = {})
           definition = { type: 'object', properties: properties }.merge(other_def_properties)
 
-          if required.nil?
-            required_attrs = required_attributes(model)
-            definition[:required] = required_attrs unless required_attrs.blank?
-          end
-
           definition[:required] = required if required.is_a?(Array) && required.any?
 
           definition
@@ -67,20 +62,6 @@ def parse_refs_and_models(refs_or_models, model)
             end
           end
         end
-
-        private
-
-        def required_attributes(model)
-          parse_entity(model) || parse_representable(model)
-        end
-
-        def parse_entity(model)
-          return unless model.respond_to?(:documentation)
-        end
-
-        def parse_representable(model)
-          return unless model.respond_to?(:map)
-        end
       end
     end
   end