fix: compilation error with the latest releases (#173)

As it has been found in the releated issue, compile error occurs because
of missing evaluation and appears to be caused by Qt6QmlTargets.cmake.
Instead of trying to hack generated files, lets just drop qml
definitions because we don't really use them explicitly

sources/libraries.cmake

@@ -5,7 +5,7 @@ find_package(Gettext REQUIRED)
 find_package(Qt6 6.6.0 REQUIRED COMPONENTS Core Concurrent DBus Network Qml Test Widgets)
 add_definitions(
         ${Qt6Core_DEFINITIONS} ${Qt6DBus_DEFINITIONS} ${Qt6Network_DEFINITIONS}
-        ${Qt6Qml_DEFINITIONS} ${Qt6Widgets_DEFINITIONS}
+        ${Qt6Widgets_DEFINITIONS}
 )
 set(Qt_INCLUDE
         ${Qt6Core_INCLUDE_DIRS} ${Qt6Concurrent_INCLUDE_DIRS} ${Qt6DBus_INCLUDE_DIRS} ${Qt6Network_INCLUDE_DIRS}