Removed unnecessary command "application"

railties/CHANGELOG.md

+*   Removed unnecessary `rails application` command.
+
+    *Arun Agrawal*
+
 *   Make the `rails:template` rake task load the application's initializers.
 
     Fixes #12133.

railties/lib/rails/commands/commands_tasks.rb

@@ -20,7 +20,6 @@ class CommandsTasks # :nodoc:
              new application called MyApp in "./my_app"
 
 In addition to those, there are:
- application  Generate the Rails application code
  destroy      Undo code generated with "generate" (short-cut alias: "d")
  plugin new   Generates skeleton for developing a Rails plugin
  runner       Run a piece of code in the application environment (short-cut alias: "r")
@@ -28,7 +27,7 @@ class CommandsTasks # :nodoc:
 All commands can be run with -h (or --help) for more information.
 EOT
 
-    COMMAND_WHITELIST = %(plugin generate destroy console server dbconsole application runner new version help)
+    COMMAND_WHITELIST = %(plugin generate destroy console server dbconsole runner new version help)
 
     def initialize(argv)
       @argv = argv
@@ -87,10 +86,6 @@ def dbconsole
       Rails::DBConsole.start
     end
 
-    def application
-      require_command!("application")
-    end
-
     def runner
       require_command!("runner")
     end