remove script/rails

use bin/rails

Change-Id: Idebe66befc3a1e32833f13860587c9c4535998a1
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/259675
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Jacob Burroughs <jburroughs@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>

script/rails

@@ -1,13 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
-
-# added by instructure:
-# resolve any symlinks in the file path, to avoid double-require issues
-require 'pathname'
-expanded_path = Pathname.new(__FILE__).realpath
-
-APP_PATH = File.expand_path('../../config/application',  expanded_path)
-require File.expand_path('../../config/boot',  expanded_path)
-require 'rails/commands'