Remove deprecated second argument from Page.find_elements

app/models/alchemy/page.rb

@@ -310,13 +310,7 @@ def new_name_for_copy(custom_name, source_name)
     #   Use this for your custom element loading logic.
     #
     # @return [ActiveRecord::Relation]
-    def find_elements(options = {}, show_non_public = false)
-      if show_non_public
-        Alchemy::Deprecation.warn "Passing true as second argument to page#find_elements to include" \
-          " invisible elements has been removed. Please implement your own ElementsFinder" \
-          " and pass it with options[:finder]."
-      end
-
+    def find_elements(options = {})
       finder = options[:finder] || Alchemy::ElementsFinder.new(options)
       finder.elements(page: self)
     end

spec/models/alchemy/page_spec.rb

@@ -1166,15 +1166,6 @@ module Alchemy
           expect(subject.map(&:name)).to eq(['news'])
         end
       end
-
-      context 'with second argument set to true' do
-        subject { page.find_elements(options, true) }
-
-        it 'warns about removal of second argument' do
-          expect(Alchemy::Deprecation).to receive(:warn)
-          subject
-        end
-      end
     end
 
     describe '#first_public_child' do