delete_driver_settings.cpp: Get rid of the weak alias.

As weak aliases are not supported on OS X, this caused problems when
building Haiku on OS X, as this file is also used for the host tools.

Signed-off-by: Axel Dörfler <axeld@pinc-software.de>

src/system/libroot/os/driver_settings.cpp

@@ -953,8 +953,8 @@ get_driver_settings(void *handle)
 }
 
 
-// this creates an alias of the above function
-// unload_driver_settings() is the same as delete_driver_settings()
-extern "C" __typeof(unload_driver_settings) delete_driver_settings
-	__attribute__((weak, alias ("unload_driver_settings")));
-
+status_t
+delete_driver_settings(void *_handle)
+{
+	return unload_driver_settings(_handle);
+}