Revert "init: handle property service callbacks asynchronously"

This is apparently causing problems with reboot.

This reverts commit 7205c6293341c82701e849fa29cfab66916d1052.

Bug: 150863651
Test: build
Change-Id: Ib8a4835cdc8358a54c7acdebc5c95038963a0419
diff --git a/init/action_manager.h b/init/action_manager.h
index b6f93d9..a2b95ac 100644
--- a/init/action_manager.h
+++ b/init/action_manager.h
@@ -16,12 +16,9 @@
 
 #pragma once
 
-#include <mutex>
 #include <string>
 #include <vector>
 
-#include <android-base/thread_annotations.h>
-
 #include "action.h"
 #include "builtins.h"
 
@@ -51,9 +48,7 @@
     void operator=(ActionManager const&) = delete;
 
     std::vector<std::unique_ptr<Action>> actions_;
-    std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_
-            GUARDED_BY(event_queue_lock_);
-    mutable std::mutex event_queue_lock_;
+    std::queue<std::variant<EventTrigger, PropertyChange, BuiltinAction>> event_queue_;
     std::queue<const Action*> current_executing_actions_;
     std::size_t current_command_;
 };