Remove outdated Style/TrailingBlankLines .rubocop_todo.yml cop.
Remove outdated Style/TrailingBlankLines .rubocop_todo.yml cop.

This style issue was already unintentionally resolved in a previous
commit due to automatic whitespace removal functionality in a local
editor.

dalehamel/ruby-pandoc,alphabetum/pandoc-ruby,alphabetum/pandoc-ruby