Use released rack

Gemfile

@@ -5,9 +5,6 @@ gemspec
 # We need a newish Rake since Active Job sets its test tasks' descriptions.
 gem 'rake', '>= 10.3'
 
-# We need unreleased Rack 2.0.0.alpha
-gem 'rack', github: 'rack/rack', branch: 'master'
-
 # This needs to be with require false to ensure correct loading order, as has to
 # be loaded after loading the test library.
 gem 'mocha', '~> 0.14', require: false

Gemfile.lock

@@ -19,14 +19,6 @@ GIT
       qu (= 0.2.0)
       redis-namespace
 
-GIT
-  remote: git://github.com/rack/rack.git
-  revision: 96ae9b9fed8d6809383b6f48a5884437e76f8ca4
-  branch: master
-  specs:
-    rack (2.0.0.alpha)
-      json
-
 GIT
   remote: git://github.com/sass/sass.git
   revision: bce9509f396225d721501ea1070a6871b708abb1
@@ -209,6 +201,8 @@ GEM
     puma (2.15.3)
     que (0.11.2)
     racc (1.4.14)
+    rack (2.0.0.alpha)
+      json
     rack-cache (1.5.1)
       rack (>= 0.4)
     rack-test (0.6.3)
@@ -331,7 +325,6 @@ DEPENDENCIES
   que
   queue_classic!
   racc (>= 1.4.6)
-  rack!
   rack-cache (~> 1.2)
   rails!
   rake (>= 10.3)

railties/lib/rails/generators/app_base.rb

@@ -220,8 +220,7 @@ module Rails
 
       def rails_gemfile_entry
         dev_edge_common = [
-            GemfileEntry.github('rack', 'rack/rack')
-          ]
+        ]
         if options.dev?
           [
             GemfileEntry.path('rails', Rails::Generators::RAILS_DEV_PATH)