Revert "DEV: add routes_lazy_route to boost boot-up time (#14545)" (#14581)

This reverts commit f5cf647e57.

The gem breaks usage of Rails URL helpers when used outside views and
controllers, for example in
88ecb83382/app/models/upload.rb (L239-L242)
the `upload_short_path` method call fails with an undefined method
exception when this gem is enabled.

Gemfile

@@ -151,7 +151,6 @@ group :test do
 end
 
 group :test, :development do
-  gem 'routes_lazy_routes'
   gem 'rspec'
   gem 'mock_redis'
   gem 'listen', require: false