Revert "Move back ubuntu classic to a standard model"

This reverts commit 1c631c99dc2a8fd5759e9c8f872610b1f2238ddf.

We're unfortunately not ready for the standard model yet.

live-build/ubuntu/ubuntu-classic-amd64.model

@@ -2,79 +2,79 @@ type: model
 authority-id: canonical
 series: 16
 brand-id: canonical
-model: ubuntu-classic-2510-amd64
+model: ubuntu-classic-2510-amd64-dangerous
 architecture: amd64
 base: core24
 classic: true
 distribution: ubuntu
-grade: signed
+grade: dangerous
 snaps:
   -
-    default-channel: classic-25.10/stable
+    default-channel: classic-25.10/edge
     id: UqFziVZDHLSyO3TqSWgNBoAdHbLI4dAH
     name: pc
     type: gadget
   -
-    default-channel: 25.10/stable
+    default-channel: 25.10/edge
     id: pYVQrBcKmBa0mZ4CCN7ExT6jH8rY1hza
     name: pc-kernel
     type: kernel
   -
-    default-channel: latest/stable
+    default-channel: latest/edge
     id: amcUKQILKXHHTlmSa7NMdnXSx02dNeeT
     name: core22
     type: base
   -
-    default-channel: latest/stable
+    default-channel: latest/edge
     id: PMrrV4ml8uWuEUDBT8dSGnKUYbevVhc4
     name: snapd
     type: snapd
   -
-    default-channel: latest/stable
+    default-channel: latest/edge
     id: EISPgh06mRh1vordZY9OZ34QHdd7OrdR
     name: bare
     type: base
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: EI0D1KHjP8XiwMZKqSjuh6W8zvcowUVP
     name: firmware-updater
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: FppXWunWzuRT2NUT9CwoBPNJNZBYOCk0
     name: desktop-security-center
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: aoc5lfC8aUd2VL8VpvynUJJhGXp5K6Dj
     name: prompting-client
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: gjf3IPXoRiipCu9K0kVu52f0H56fIksg
     name: snap-store
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: jZLfBRzf1cYlYysIjD2bwSzNtngY0qit
     name: gtk-common-themes
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: 3wdHCAVyZEmYsCMFDE9qt92UV8rC8Wdk
     name: firefox
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: lATO8HzwVvrAPrlZRAWpfyrJKlAJrZS3
-    name: gnome-42-2210
+    name: gnome-42-2204
     type: app
   -
-    default-channel: latest/stable/ubuntu-25.10
+    default-channel: latest/edge
     id: IrwRHakqtzhFRHJOOPxKVPU0Kk7Erhcu
     name: snapd-desktop-integration
     type: app
-timestamp: 2025-08-06T12:00:00.0Z
+timestamp: 2025-05-01T12:00:00.0Z
 sign-key-sha3-384: 9tydnLa6MTJ-jaQTFUXEwHl1yRx7ZS4K5cyFDhYDcPzhS7uyEkDxdUjg9g08BtNn
 
 AcLBXAQAAQoABgUCaBpC0wAKCRDgT5vottzAEmTaD/4+m7UJU64O0/Nu5OimYd5aSYoi1PSH5nq6