class RuboCop::Cop::Style::RedundantException

raise RuntimeError, ‘message’
@example
Currently it checks for code like this:
This cop checks for RuntimeError as the argument of raise/fail.

def on_send(node) 

def on_send(node)
  return unless command?(:raise, node) || command?(:fail, node)
  _receiver, _selector, *args = *node
  return unless args.size == 2
  first_arg, = *args
  add_offense(first_arg, :expression) if first_arg == TARGET_NODE
end