Remove duplication in max documents allowed code

app/components/documents/nested_component.html.erb

@@ -2,7 +2,7 @@
   <%= f.label :documents, t("documents.form.title") %>
   <p class="help-text"><%= documentables_note %></p>
 
-  <div id="nested-documents" data-max-documents-allowed="<%= documentable.class.max_documents_allowed %>">
+  <div id="nested-documents" data-max-documents-allowed="<%= max_documents_allowed %>">
     <%= f.fields_for :documents do |documents_builder| %>
       <%= render Documents::FieldsComponent.new(documents_builder) %>
     <% end %>

app/components/documents/nested_component.rb

@@ -23,6 +23,6 @@ class Documents::NestedComponent < ApplicationComponent
     end
 
     def max_documents_allowed?
-      documentable.documents.count >= documentable.class.max_documents_allowed
+      documentable.documents.count >= max_documents_allowed
     end
 end