loading is not needed with zeitwerk autoloader

app/controllers/api/providers_controller.rb

@@ -141,15 +141,11 @@ def provider_options(type)
     end
 
     def permitted_subclasses
-      ActiveSupport::Dependencies.interlock.loading do
-        ManageIQ::Providers::BaseManager.permitted_subclasses
-      end
+      ManageIQ::Providers::BaseManager.permitted_subclasses
     end
 
     def supported_types_for_create
-      ActiveSupport::Dependencies.interlock.loading do
-        ExtManagementSystem.supported_types_for_create
-      end
+      ExtManagementSystem.supported_types_for_create
     end
 
     def providers_options

lib/api/environment.rb

@@ -24,14 +24,10 @@ def self.encrypted_attributes_whitelist
     def self.time_attributes
       @time_attributes ||= ApiConfig.collections.each.with_object(Set.new(%w(expires_on))) do |(_, cspec), result|
         next if cspec[:klass].blank?
-        klass = nil
-
-        # Ensure we're the only thread trying to autoload classes and their columns
-        ActiveSupport::Dependencies.interlock.loading do
-          klass = cspec[:klass].constantize
-          klass.columns_hash.each do |name, typeobj|
-            result << name if %w(date datetime).include?(typeobj.type.to_s)
-          end
+
+        klass = cspec[:klass].constantize
+        klass.columns_hash.each do |name, typeobj|
+          result << name if %w(date datetime).include?(typeobj.type.to_s)
         end
       end
     end