WinRT plugin is unnecessarily loaded by default, SDK installer takes care of "ForceEnabled"

At startup, the WinRT plugin causes this debug output:

Running Windows Runtime device detection.
No winrtrunner.exe found.
Running Windows Runtime device detection.
No winrtrunner.exe found.
Running Windows Runtime device detection.
No winrtrunner.exe found.

I guess it does find no winrtrunner.exe. 3 Times.

It is a niche plugin, giving that output to every Windows user. That is unnecessary, because the SDK installer takes care that the plugin is force loaded if a WinRT Qt package gets installed. The plugin can be disabled by default.

see:
https://codereview.qt-project.org/gitweb?p=qtsdk/tqtc-qtsdk.git;a=blob;f=packaging-tools/configurations/pkg_templates/pkg_qt5_template/qt.qt5.%25QT_PKG_VERSION%25.win64_msvc2015_winrt_armv7/meta/installscript.qs;h=11e6c5f20a3eafaf1f39366880273e1df803dab6;hb=refs/changes/97/281997/2#l135