applets/notifications: stop suppressing dialog-information icon

This will feel weird and random to the user, especially if they or one
of their apps deliberately uses that icon and then it unexpectedly isn't
displayed. This check feels too magical and unpredictable; let's remove
it to simplify things.

BUG: 458843
FIXED-IN: 5.26

applets/notifications/package/contents/ui/NotificationItem.qml

@@ -287,8 +287,7 @@ ColumnLayout {
                     anchors.fill: parent
                     usesPlasmaTheme: false
                     smooth: true
-                    // don't show a generic "info" icon since this is a notification already
-                    source: notificationItem.icon !== "dialog-information" ? notificationItem.icon : ""
+                    source: notificationItem.icon
                     visible: active
                 }