Remove deprecated start of flow no link to config entry (#155956)

Co-authored-by: Franck Nijhof <git@frenck.dev>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

homeassistant/config_entries.py

@@ -1418,10 +1418,8 @@ class ConfigEntriesFlowManager(
             SOURCE_REAUTH,
             SOURCE_RECONFIGURE,
         } and "entry_id" not in context:
-            # Deprecated in 2024.12, should fail in 2025.12
-            report_usage(
-                f"initialises a {source} flow without a link to the config entry",
-                breaks_in_ha_version="2025.12",
+            raise HomeAssistantError(
+                f"Cannot initialize a {source} flow without a link to the config entry"
             )
 
         flow_id = ulid_util.ulid_now()

tests/test_config_entries.py

@@ -5983,9 +5983,8 @@ async def test_reauth_reconfigure_missing_entry(
     await hass.async_block_till_done()
 
     with pytest.raises(
-        RuntimeError,
-        match=f"Detected code that initialises a {source} flow without a link "
-        "to the config entry. Please report this issue",
+        HomeAssistantError,
+        match=f"Cannot initialize a {source} flow without a link to the config entry",
     ):
         await manager.flow.async_init("test", context={"source": source})
     await hass.async_block_till_done()
@@ -6002,7 +6001,6 @@ async def test_reauth_reconfigure_missing_entry_component(
     hass: HomeAssistant,
     manager: config_entries.ConfigEntries,
     source: str,
-    caplog: pytest.LogCaptureFixture,
 ) -> None:
     """Test the async_reauth_helper."""
     entry = MockConfigEntry(title="test_title", domain="test")
@@ -6015,19 +6013,18 @@ async def test_reauth_reconfigure_missing_entry_component(
     await manager.async_setup(entry.entry_id)
     await hass.async_block_till_done()
 
-    with patch.object(frame, "_REPORTED_INTEGRATIONS", set()):
+    with (
+        patch.object(frame, "_REPORTED_INTEGRATIONS", set()),
+        pytest.raises(
+            HomeAssistantError,
+            match=f"Cannot initialize a {source} flow without a link to the config entry",
+        ),
+    ):
         await manager.flow.async_init("test", context={"source": source})
-        await hass.async_block_till_done()
 
-    # Flow still created, but deprecation logged
+    # Flow is not created
     flows = hass.config_entries.flow.async_progress()
-    assert len(flows) == 1
-    assert flows[0]["context"]["source"] == source
-
-    assert (
-        f"Detected that integration 'hue' initialises a {source} flow"
-        " without a link to the config entry at homeassistant/components" in caplog.text
-    )
+    assert len(flows) == 0
 
 
 async def test_reconfigure(