Remove ScoutAPM, no longer used (#1232)

Gemfile

@@ -156,8 +156,6 @@ gem 'rails-settings-ui'
 gem 'rails-settings-cached', '0.7.2'
 gem 'dry-validation', '0.12.3'
 
-gem 'scout_apm'
-
 # Respond to ELB healthchecks in /ping and /ping/
 gem 'openstax_healthcheck'
 

Gemfile.lock

@@ -653,8 +653,6 @@ GEM
     sassc (2.0.1)
       ffi (~> 1.9)
       rake
-    scout_apm (5.1.0)
-      parser
     sd_notify (0.1.1)
     selenium-webdriver (4.9.0)
       rexml (~> 3.2, >= 3.2.5)
@@ -836,7 +834,6 @@ DEPENDENCIES
   rubocop-rspec
   ruby-debug-ide
   sass-rails (~> 5.0)
-  scout_apm
   sd_notify
   selenium-webdriver
   sentry-rails

app/controllers/api/v1/users_controller.rb

@@ -112,8 +112,6 @@ def index
     #{json_schema(Api::V1::UserRepresenter, include: :readable)}
   EOS
   def show
-    ScoutHelper.ignore!(0.999)
-
     OSU::AccessPolicy.require_action_allowed!(:read, current_api_user, current_human_user)
 
     SetGdprData.call(user: current_human_user,

config/delayed_job_worker_pool.rb

@@ -1,6 +1,5 @@
 require 'etc'
 require 'sd_notify'
-require 'scout_apm'
 
 # Notify systemd that we are the main process
 SdNotify.mainpid Process.pid
@@ -84,10 +83,3 @@ def shutdown(signal)
     end
   end
 end
-
-# Make sure scout_apm doesn't start until we fork
-::ScoutApm::BackgroundJobIntegrations::DelayedJob.class_exec do
-  def forking?
-    true
-  end
-end

config/environment.rb

@@ -1,7 +1,6 @@
 # Load the Rails application
 require_relative 'application'
 
-require 'scout_helper'
 require 'env_utilities'
 require 'token_maker'
 require 'markdown_wrapper'

config/initializers/doorkeeper_models.rb

@@ -38,7 +38,6 @@ def create_application_user
   Doorkeeper::TokensController.class_exec do
     alias_method :original_create, :create # before_action not available
     def create
-      ScoutHelper.ignore!(0.99)
       original_create
     end
   end