Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Task-number: QTBUG-67283
Change-Id: I708fd1f9f2b73d60f57cc3568646929117825813
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Remove now-unused IPlugin::addAutoReleasedObject and IPlugin::
{add,remove}Object convenience functions that were only forwarding
to the global pool.
Adjust all related tests.
All previous users of these convenience functions are gone, and we do
not want to encourage the use of object pool anymore.
Plugins that wish to share objects to implement weak dependencies
can use the global object pool via ExtensionSystem::PluginManager::
{add,remove}Object directly.
Change-Id: Ic668ad5504af76963f6d4c69ae160438efc70db5
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
