dep: drop bcrypt_pbkdf workaround

Author: flavorjones

test/integration/user_journey_test.sh

@@ -28,9 +28,6 @@ pushd test-app
 bundle remove rails --skip-install
 bundle add rails --skip-install ${RAILSOPTS:-}
 
-# work around https://github.com/net-ssh/bcrypt_pbkdf-ruby/issues/24
-bundle add bcrypt_pbkdf -v 1.1.1.rc2 --skip-install
-
 # use the tailwindcss-rails under test
 bundle add tailwindcss-rails --path="../.."
 bundle install