Remove mention of branch to commit to.

app/views/projects/_commit_button.html.haml

@@ -2,8 +2,5 @@
   .commit-button-annotation
     = button_tag 'Commit Changes',
                  class: 'btn commit-btn js-commit-button btn-create'
-    .message
-      to branch
-      %strong= ref
   = link_to 'Cancel', cancel_path,
             class: 'btn btn-cancel', data: {confirm: leave_edit_message}