remove bogus no_cxx_module conditional

this flag specifies that the plugin does not track a qt module. this is
entirely unrelated to whether the plugin should be versioned.

amends f54a3d78

.

Change-Id: Ibd3e9bedf488dc58e6354ccf7dd33d974e5f52c2
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

mkspecs/features/qml_plugin.prf

@@ -27,7 +27,7 @@ CONFIG += relative_qt_rpath  # Qt's QML plugins should be relocatable
 }
 isEmpty(TARGETPATH): TARGETPATH = $$eval(QT.$${CXX_MODULE}.name)
 
-!no_cxx_module:win32:CONFIG(shared, static|shared) {
+win32:CONFIG(shared, static|shared) {
     # Embed a VERSIONINFO resource into the plugin's DLL.
     isEmpty(VERSION): VERSION = $$MODULE_VERSION
     CONFIG += skip_target_version_ext