channels: drop v2025dev3

v2025dev3 was marked as closed two weeks ago, so according to
our policy it's time to drop it completely, see:
https://www.apertis.org/guides/maintenance/apertis_release_process/#dashboard-update



Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

data/channels.yaml

@@ -41,13 +41,6 @@ channels:
   apertis/v2024-updates:
     <<: *apertis_v2024
     suite: v2024-updates
-  apertis/v2025dev3:
-    <<: *apertis_v2024
-    release: v2025dev3
-    suite: v2025dev3
-    base: apertis/v2025dev3
-    components: *APERTIS_COMPONENTS
-    status: closed
   apertis/v2025pre:
     <<: *apertis_v2024
     release: v2025pre