Remove useless restriction on concurrent-ruby (#399)

Author: tagliala

Appraisals

@@ -8,8 +8,6 @@ end
 
 appraise 'rails-7.1' do
   gem 'rails', '~> 7.1.0'
-
-  gem 'concurrent-ruby', '1.3.4' # Ref: rails/rails#54260
 end
 
 appraise 'rails-7.2' do

gemfiles/rails_7.1.gemfile

@@ -18,6 +18,5 @@ gem "rubocop-performance", require: false
 gem "rubocop-rails", require: false
 gem "rubocop-rake", require: false
 gem "rubocop-rspec", require: false
-gem "concurrent-ruby", "1.3.4"
 
 gemspec path: "../"