A script to unfollow everyone on Twitter and another to remove retweets from your Twitter timeline

remove_amplification.rb

require 'rubygems'
require 'twitter'

$stdout.sync = true

def rate_limited
  begin
    yield
  rescue Twitter::Error::TooManyRequests => error
    sleep error.rate_limit.reset_in + 1
    retry
  end
end

client = Twitter::REST::Client.new do |config|
  config.consumer_key        = ENV.fetch('TW_CONSUMER_KEY')
  config.consumer_secret     = ENV.fetch('TW_CONSUMER_SECRET')
  config.access_token        = ENV.fetch('TW_ACCESS_TOKEN')
  config.access_token_secret = ENV.fetch('TW_ACCESS_TOKEN_SECRET')
end

rate_limited do
  client.friends.each do |user|
    rate_limited do
      client.friendship_update(user, :retweets => false )
    end
    print "."
  end
end

puts "\nEnjoy the quieter twitter stream!"

unfollow.rb

require 'rubygems'
require 'twitter'

client = Twitter::REST::Client.new do |config|
  config.consumer_key        = ENV.fetch('TW_CONSUMER_KEY')
  config.consumer_secret     = ENV.fetch('TW_CONSUMER_SECRET')
  config.access_token        = ENV.fetch('TW_ACCESS_TOKEN')
  config.access_token_secret = ENV.fetch('TW_ACCESS_TOKEN_SECRET')
end

BATCH_SIZE = 30

while true do
  users = client.friends.take(BATCH_SIZE)

  if users.empty?
    puts "Done! You now have no friends"
    exit 0
  end

  unfollowed = client.unfollow users
  unfollowed.each do |user|
    puts "unfollowed: #{user.handle}"
  end
end

You need to create a Twitter application and generate your keys there. After wiping who I'm following, I deleted the app.