Don't require lib/gitlab/request_profiler/middleware.rb in config/initializers/request_profiler.rb

Signed-off-by: Rémy Coutable <remy@rymai.me>

changelogs/unreleased/20452-remove-require-from-request_profiler-initializer.yml

+---
+title: Don't require lib/gitlab/request_profiler/middleware.rb in config/initializers/request_profiler.rb
+merge_request:
+author:

config/initializers/request_profiler.rb

-require 'gitlab/request_profiler/middleware'
-
 Rails.application.configure do |config|
   config.middleware.use(Gitlab::RequestProfiler::Middleware)
 end

lib/gitlab/request_profiler/middleware.rb

 require 'ruby-prof'
-require_dependency 'gitlab/request_profiler'
 
 module Gitlab
   module RequestProfiler
@@ -20,7 +19,7 @@ module Gitlab
         header_token = env['HTTP_X_PROFILE_TOKEN']
         return unless header_token.present?
 
-        profile_token = RequestProfiler.profile_token
+        profile_token = Gitlab::RequestProfiler.profile_token
         return unless profile_token.present?
 
         header_token == profile_token