Do not use required='required' when browser validations are turned off

lib/simple_form/inputs/base.rb

@@ -74,7 +74,7 @@ module SimpleForm
 
       # Whether this input is valid for HTML 5 required attribute.
       def has_required?
-        attribute_required? && SimpleForm.html5
+        attribute_required? && SimpleForm.html5 && SimpleForm.browser_validations
       end
 
       def has_autofocus?

test/inputs_test.rb

@@ -780,6 +780,14 @@ class InputTest < ActionView::TestCase
     end
   end
 
+  test 'when not using browser validations, input should not generate required html attribute' do
+    swap SimpleForm, :browser_validations => false do
+      with_input_for @user, :name, :string
+      assert_select 'input[type=text].required'
+      assert_no_select 'input[type=text][required]'
+    end
+  end
+
   test 'collection input with select type should not generate invalid required html attribute' do
     with_input_for @user, :name, :select, :collection => ['Jose' , 'Carlos']
     assert_select 'select.required'