delete.rb

client = Twitter::REST::Client.new do |config|
  config.consumer_key        = CONSUMER_KEY
  config.consumer_secret     = CONSUMER_SECRET
  config.access_token        = OAUTH_TOKEN
  config.access_token_secret = OAUTH_TOKEN_SECRET
end

def remove_friendships(client)
  begin
      client.friends.each do |friend|
        client.unfollow(friend)
      end

  rescue Twitter::Error::TooManyRequests => e
    puts "rate limited; sleeping for #{e.rate_limit.reset_in} seconds"
    sleep e.rate_limit.reset_in
    retry

  rescue StandardError => e
    puts e.inspect
    exit
  end

end

remove_friendships(client)