chore: move core24 gnome-extension to stable (#4799)

The gnome extension for core24 is considered stable now that
the gpu-2404 SDK has been integrated.

snapcraft/extensions/gnome.py

@@ -82,11 +82,6 @@ def get_supported_confinement() -> Tuple[str, ...]:
     @staticmethod
     @overrides
     def is_experimental(base: Optional[str]) -> bool:
-        # core24 is experimental until streamlined graphics support is finalized
-        # see https://forum.snapcraft.io/t/39718
-        if base == "core24":
-            return True
-
         return False
 
     @overrides

tests/spread/core24/linters-pack/task.yaml

@@ -9,8 +9,6 @@ environment:
   SNAP/library_ignored_mixed: library-ignored-mixed
   SNAP/library_missing: library-missing
   SNAP/library_unused: library-unused
-  # gnome-extension core24 is experimental
-  SNAPCRAFT_ENABLE_EXPERIMENTAL_EXTENSIONS: "1"
 
 restore: |
   cd "${SNAP}"

tests/unit/extensions/test_gnome.py

@@ -75,15 +75,9 @@ def test_get_supported_confinement():
     assert gnome.GNOME.get_supported_confinement() == ("strict", "devmode")
 
 
-@pytest.mark.parametrize(
-    ("base", "is_experimental"),
-    [
-        ("core22", False),
-        ("core24", True),
-    ],
-)
-def test_is_experimental(base, is_experimental):
-    assert gnome.GNOME.is_experimental(base=base) is is_experimental
+@pytest.mark.parametrize("base", ["core22", "core24"])
+def test_is_experimental(base):
+    assert gnome.GNOME.is_experimental(base=base) is False
 
 
 def test_get_app_snippet(gnome_extension):