Simplify Gemfile by removing unused Gems

Gemfile

@@ -32,7 +32,6 @@ gem 'pagedown-bootstrap-rails'
 gem 'pg'
 gem 'proforma', github: 'openHPI/proforma', tag: 'v0.7.1'
 gem 'prometheus_exporter'
-gem 'pry-byebug'
 gem 'puma'
 gem 'pundit'
 gem 'rails', '~> 7.0.4'
@@ -40,13 +39,12 @@ gem 'rails_admin', '< 4.0.0'
 gem 'rails-i18n'
 gem 'rails-timeago'
 gem 'ransack'
-gem 'rest-client'
 gem 'rubytree'
 gem 'rubyzip'
 gem 'sass-rails'
 gem 'shakapacker', '6.5.6'
 gem 'slim-rails'
-gem 'sorcery' # Causes a deprecation warning in Rails 6.0+, see: https://github.com/Sorcery/sorcery/pull/255
+gem 'sorcery'
 gem 'sprockets-rails'
 gem 'telegraf'
 gem 'terser'
@@ -66,10 +64,10 @@ end
 
 group :development, :staging do
   gem 'better_errors'
-  gem 'binding_of_caller'
   gem 'bootsnap', require: false
   gem 'letter_opener'
   gem 'listen'
+  gem 'pry-byebug'
   gem 'pry-rails'
   gem 'rack-mini-profiler'
   gem 'rubocop', require: false
@@ -80,14 +78,11 @@ group :development, :staging do
 end
 
 group :test do
-  gem 'autotest' # required by autotest-rails
-  gem 'autotest-rails'
   gem 'capybara'
   gem 'database_cleaner'
   gem 'headless'
   gem 'nyan-cat-formatter'
   gem 'rails-controller-testing'
-  gem 'rspec-autotest'
   gem 'rspec-collection_matchers'
   gem 'rspec-github', require: false
   gem 'rspec-rails'