chore: remove unneeded files

www/resources/meta-data/qmlprojects.json

-{
-    "projects": [
-        {
-            "file": "ClusterTutorial.qmlrc"
-        },
-        {
-            "file": "CoffeeMachine.qmlrc"
-        },
-        {
-            "file": "EBikeDesign.qmlrc"
-        },
-        {
-            "file": "SideMenu.qmlrc"
-        },
-        {
-            "file": "WebinarDemo.qmlrc"
-        },
-        {
-            "file": "MaterialBundle.qmlrc"
-        }
-    ]
-}