Moved pronoun heading to make it more obvoius

I moved the "Pronoun" heading directly above the input field. It turned out that a lot of users were entering "He
 or "She" in the name field, I believe that was because of the placement of the "Pronoun" heading. I also needed to remove the optional warning but I'm hoping that won't cause problems.

app/views/registration_steps/_name.html.haml

@@ -3,8 +3,8 @@
   = save_registration_step do
     = columns(medium: 12) do
       = textfield :name, @name, required: true, big: true
-      %h3=_'articles.conference_registration.headings.pronoun'
     = columns(medium: 6) do
       %p.small=_'articles.conference_registration.paragraphs.pronoun', :p
     = columns(medium: 6) do
-      = textfield :pronoun, @pronoun, required: false, big: true, warning: 'articles.conference_registration.paragraphs.pronoun_optional'
+      %h3=_'articles.conference_registration.headings.pronoun'
+      = textfield :pronoun, @pronoun, required: false, big: true