Removed notifications vala demo.

Author: benpocalypse

src/Library/demos/Notifications/main.vala

@@ -9,7 +9,6 @@
     <file>Library/demos/Notifications/main.json</file>
     <file>Library/demos/Notifications/main.blp</file>
     <file>Library/demos/Notifications/main.ui</file>
-    <file>Library/demos/Notifications/main.vala</file>
     <file>Library/demos/Toasts/main.js</file>
     <file>Library/demos/Toasts/main.json</file>
     <file>Library/demos/Toasts/main.blp</file>