diff --git a/homeassistant/helpers/entity_registry.py b/homeassistant/helpers/entity_registry.py
index 5946542b394..ef9274c6ceb 100644
--- a/homeassistant/helpers/entity_registry.py
+++ b/homeassistant/helpers/entity_registry.py
@@ -643,29 +643,6 @@ class EntityRegistry(BaseRegistry):
             run_immediately=True,
         )
 
-    @callback
-    def async_get_device_class_lookup(
-        self, domain_device_classes: set[tuple[str, str | None]]
-    ) -> dict[str, dict[tuple[str, str | None], str]]:
-        """Return a lookup of entity ids for devices which have matching entities.
-
-        Entities must match a set of (domain, device_class) tuples.
-        The result is indexed by device_id, then by the matching (domain, device_class)
-        """
-        lookup: dict[str, dict[tuple[str, str | None], str]] = {}
-        for entity in self.entities.values():
-            if not entity.device_id:
-                continue
-            device_class = entity.device_class or entity.original_device_class
-            domain_device_class = (entity.domain, device_class)
-            if domain_device_class not in domain_device_classes:
-                continue
-            if entity.device_id not in lookup:
-                lookup[entity.device_id] = {domain_device_class: entity.entity_id}
-            else:
-                lookup[entity.device_id][domain_device_class] = entity.entity_id
-        return lookup
-
     @callback
     def async_is_registered(self, entity_id: str) -> bool:
         """Check if an entity_id is currently registered."""
diff --git a/tests/helpers/test_entity_registry.py b/tests/helpers/test_entity_registry.py
index a9177fc8c83..91c749a0d7f 100644
--- a/tests/helpers/test_entity_registry.py
+++ b/tests/helpers/test_entity_registry.py
@@ -954,85 +954,6 @@ async def test_restore_states(
     assert hass.states.get("light.all_info_set") is None
 
 
-async def test_async_get_device_class_lookup(
-    hass: HomeAssistant, entity_registry: er.EntityRegistry
-) -> None:
-    """Test registry device class lookup."""
-    hass.set_state(CoreState.not_running)
-
-    entity_registry.async_get_or_create(
-        "binary_sensor",
-        "light",
-        "battery_charging",
-        device_id="light_device_entry_id",
-        original_device_class="battery_charging",
-    )
-    entity_registry.async_get_or_create(
-        "sensor",
-        "light",
-        "battery",
-        device_id="light_device_entry_id",
-        original_device_class="battery",
-    )
-    entity_registry.async_get_or_create(
-        "light", "light", "demo", device_id="light_device_entry_id"
-    )
-    entity_registry.async_get_or_create(
-        "binary_sensor",
-        "vacuum",
-        "battery_charging",
-        device_id="vacuum_device_entry_id",
-        original_device_class="battery_charging",
-    )
-    entity_registry.async_get_or_create(
-        "sensor",
-        "vacuum",
-        "battery",
-        device_id="vacuum_device_entry_id",
-        original_device_class="battery",
-    )
-    entity_registry.async_get_or_create(
-        "vacuum", "vacuum", "demo", device_id="vacuum_device_entry_id"
-    )
-    entity_registry.async_get_or_create(
-        "binary_sensor",
-        "remote",
-        "battery_charging",
-        device_id="remote_device_entry_id",
-        original_device_class="battery_charging",
-    )
-    entity_registry.async_get_or_create(
-        "remote", "remote", "demo", device_id="remote_device_entry_id"
-    )
-
-    device_lookup = entity_registry.async_get_device_class_lookup(
-        {("binary_sensor", "battery_charging"), ("sensor", "battery")}
-    )
-
-    assert device_lookup == {
-        "remote_device_entry_id": {
-            (
-                "binary_sensor",
-                "battery_charging",
-            ): "binary_sensor.remote_battery_charging"
-        },
-        "light_device_entry_id": {
-            (
-                "binary_sensor",
-                "battery_charging",
-            ): "binary_sensor.light_battery_charging",
-            ("sensor", "battery"): "sensor.light_battery",
-        },
-        "vacuum_device_entry_id": {
-            (
-                "binary_sensor",
-                "battery_charging",
-            ): "binary_sensor.vacuum_battery_charging",
-            ("sensor", "battery"): "sensor.vacuum_battery",
-        },
-    }
-
-
 async def test_remove_device_removes_entities(
     hass: HomeAssistant,
     entity_registry: er.EntityRegistry,