diff --git a/homeassistant/components/zha/binary_sensor.py b/homeassistant/components/zha/binary_sensor.py
index 3333bf6bb3e..a3348ad974d 100644
--- a/homeassistant/components/zha/binary_sensor.py
+++ b/homeassistant/components/zha/binary_sensor.py
@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 import functools
-from typing import Any
 
 from zigpy.quirks.v2 import BinarySensorMetadata, EntityMetadata
 import zigpy.types as t
@@ -209,36 +208,6 @@ class IASZone(BinarySensor):
         """Parse the raw attribute into a bool state."""
         return BinarySensor.parse(value & 3)  # use only bit 0 and 1 for alarm state
 
-    # temporary code to migrate old IasZone sensors to update attribute cache state once
-    # remove in 2024.4.0
-    @property
-    def extra_state_attributes(self) -> dict[str, Any]:
-        """Return state attributes."""
-        return {"migrated_to_cache": True}  # writing new state means we're migrated
-
-    # temporary migration code
-    @callback
-    def async_restore_last_state(self, last_state):
-        """Restore previous state."""
-        # trigger migration if extra state attribute is not present
-        if "migrated_to_cache" not in last_state.attributes:
-            self.migrate_to_zigpy_cache(last_state)
-
-    # temporary migration code
-    @callback
-    def migrate_to_zigpy_cache(self, last_state):
-        """Save old IasZone sensor state to attribute cache."""
-        # previous HA versions did not update the attribute cache for IasZone sensors, so do it once here
-        # a HA state write is triggered shortly afterwards and writes the "migrated_to_cache" extra state attribute
-        if last_state.state == STATE_ON:
-            migrated_state = IasZone.ZoneStatus.Alarm_1
-        else:
-            migrated_state = IasZone.ZoneStatus(0)
-
-        self._cluster_handler.cluster.update_attribute(
-            IasZone.attributes_by_name[self._attribute_name].id, migrated_state
-        )
-
 
 @STRICT_MATCH(cluster_handler_names=CLUSTER_HANDLER_ZONE, models={"WL4200", "WL4200S"})
 class SinopeLeakStatus(BinarySensor):
diff --git a/tests/components/zha/test_binary_sensor.py b/tests/components/zha/test_binary_sensor.py
index 91a800cafd5..18e78ae7e57 100644
--- a/tests/components/zha/test_binary_sensor.py
+++ b/tests/components/zha/test_binary_sensor.py
@@ -16,7 +16,6 @@ from .common import (
     async_test_rejoin,
     find_entity_id,
     send_attributes_report,
-    update_attribute_cache,
 )
 from .conftest import SIG_EP_INPUT, SIG_EP_OUTPUT, SIG_EP_PROFILE, SIG_EP_TYPE
 
@@ -151,66 +150,6 @@ async def test_binary_sensor(
     assert hass.states.get(entity_id).state == STATE_OFF
 
 
-@pytest.mark.parametrize(
-    "restored_state",
-    [
-        STATE_ON,
-        STATE_OFF,
-    ],
-)
-async def test_binary_sensor_migration_not_migrated(
-    hass: HomeAssistant,
-    zigpy_device_mock,
-    core_rs,
-    zha_device_restored,
-    restored_state,
-) -> None:
-    """Test temporary ZHA IasZone binary_sensor migration to zigpy cache."""
-
-    entity_id = "binary_sensor.fakemanufacturer_fakemodel_ias_zone"
-    core_rs(entity_id, state=restored_state, attributes={})  # migration sensor state
-    await async_mock_load_restore_state_from_storage(hass)
-
-    zigpy_device = zigpy_device_mock(DEVICE_IAS)
-
-    zha_device = await zha_device_restored(zigpy_device)
-    entity_id = find_entity_id(Platform.BINARY_SENSOR, zha_device, hass)
-
-    assert entity_id is not None
-    assert hass.states.get(entity_id).state == restored_state
-
-    # confirm migration extra state attribute was set to True
-    assert hass.states.get(entity_id).attributes["migrated_to_cache"]
-
-
-async def test_binary_sensor_migration_already_migrated(
-    hass: HomeAssistant,
-    zigpy_device_mock,
-    core_rs,
-    zha_device_restored,
-) -> None:
-    """Test temporary ZHA IasZone binary_sensor migration doesn't migrate multiple times."""
-
-    entity_id = "binary_sensor.fakemanufacturer_fakemodel_ias_zone"
-    core_rs(entity_id, state=STATE_OFF, attributes={"migrated_to_cache": True})
-    await async_mock_load_restore_state_from_storage(hass)
-
-    zigpy_device = zigpy_device_mock(DEVICE_IAS)
-
-    cluster = zigpy_device.endpoints.get(1).ias_zone
-    cluster.PLUGGED_ATTR_READS = {
-        "zone_status": security.IasZone.ZoneStatus.Alarm_1,
-    }
-    update_attribute_cache(cluster)
-
-    zha_device = await zha_device_restored(zigpy_device)
-    entity_id = find_entity_id(Platform.BINARY_SENSOR, zha_device, hass)
-
-    assert entity_id is not None
-    assert hass.states.get(entity_id).state == STATE_ON  # matches attribute cache
-    assert hass.states.get(entity_id).attributes["migrated_to_cache"]
-
-
 @pytest.mark.parametrize(
     "restored_state",
     [