Cleanup various headers to reduce compilation times (#6255)

* Cleanup various headers to reduce compilation times

src/script/cpp_api/s_async.h

@@ -24,8 +24,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <deque>
 #include <map>
 
-#include "threading/thread.h"
 #include "threading/semaphore.h"
+#include "threading/thread.h"
 #include "debug.h"
 #include "lua.h"
 #include "cpp_api/s_base.h"
@@ -39,7 +39,7 @@ class AsyncEngine;
 // Data required to queue a job
 struct LuaJobInfo
 {
-	LuaJobInfo() {};
+	LuaJobInfo() = default;
 
 	// Function to be called in async environment
 	std::string serializedFunction = "";

src/script/cpp_api/s_base.h

@@ -23,6 +23,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <iostream>
 #include <string>
 #include <thread>
+#include <mutex>
 #include "util/basic_macros.h"
 
 extern "C" {
@@ -30,7 +31,6 @@ extern "C" {
 }
 
 #include "irrlichttypes.h"
-#include "threading/mutex_auto_lock.h"
 #include "common/c_types.h"
 #include "common/c_internal.h"
 

src/script/cpp_api/s_internal.h

@@ -30,6 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <thread>
 #include "common/c_internal.h"
 #include "cpp_api/s_base.h"
+#include "threading/mutex_auto_lock.h"
 
 #ifdef SCRIPTAPI_LOCK_DEBUG
 #include "debug.h" // assert()