Un-pin turbo-rails to fix Rails 6.1 builds

Author: mshibuya

Appraisals

@@ -38,7 +38,6 @@ appraise 'rails-6.1' do
   gem 'rails', '~> 6.1.0'
   gem 'sassc-rails', '~> 2.1'
   gem 'devise', '~> 4.7'
-  gem 'turbo-rails', platform: :jruby, github: 'hotwired/turbo-rails'
 
   group :test do
     gem 'cancancan', '~> 3.2'

gemfiles/rails_6.1.gemfile

@@ -9,7 +9,6 @@ gem "rails", "~> 6.1.0"
 gem "webpacker", require: false
 gem "webrick", "~> 1.7"
 gem "sassc-rails", "~> 2.1"
-gem "turbo-rails", platform: :jruby, github: "hotwired/turbo-rails"
 
 group :active_record do
   gem "paper_trail", ">= 12.0"