diff --git a/homeassistant/components/proximity/coordinator.py b/homeassistant/components/proximity/coordinator.py
index 2d32926832a..a8dd85c1523 100644
--- a/homeassistant/components/proximity/coordinator.py
+++ b/homeassistant/components/proximity/coordinator.py
@@ -13,7 +13,6 @@ from homeassistant.const import (
     ATTR_NAME,
     CONF_UNIT_OF_MEASUREMENT,
     CONF_ZONE,
-    UnitOfLength,
 )
 from homeassistant.core import (
     Event,
@@ -27,7 +26,6 @@ from homeassistant.helpers.issue_registry import IssueSeverity, async_create_iss
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 from homeassistant.util.location import distance
-from homeassistant.util.unit_conversion import DistanceConverter
 
 from .const import (
     ATTR_DIR_OF_TRAVEL,
@@ -145,18 +143,6 @@ class ProximityDataUpdateCoordinator(DataUpdateCoordinator[ProximityData]):
                 },
             )
 
-    def convert_legacy(self, value: float | str) -> float | str:
-        """Round and convert given distance value."""
-        if isinstance(value, str):
-            return value
-        return round(
-            DistanceConverter.convert(
-                value,
-                UnitOfLength.METERS,
-                self.unit_of_measurement,
-            )
-        )
-
     def _calc_distance_to_zone(
         self,
         zone: State,
diff --git a/tests/components/proximity/test_init.py b/tests/components/proximity/test_init.py
index 37573483b74..eeb181e0670 100644
--- a/tests/components/proximity/test_init.py
+++ b/tests/components/proximity/test_init.py
@@ -879,3 +879,44 @@ async def test_sensor_unique_ids(
     assert (
         entity.unique_id == f"{mock_config.entry_id}_device_tracker.test2_dist_to_zone"
     )
+
+
+async def test_tracked_zone_is_removed(hass: HomeAssistant) -> None:
+    """Test that tracked zone is removed."""
+    await async_setup_single_entry(hass, "zone.home", ["device_tracker.test1"], [], 1)
+
+    hass.states.async_set(
+        "device_tracker.test1",
+        "home",
+        {"friendly_name": "test1", "latitude": 2.1, "longitude": 1.1},
+    )
+    await hass.async_block_till_done()
+
+    # check sensor entities
+    state = hass.states.get("sensor.home_nearest_device")
+    assert state.state == "test1"
+
+    entity_base_name = "sensor.home_test1"
+    state = hass.states.get(f"{entity_base_name}_distance")
+    assert state.state == "0"
+    state = hass.states.get(f"{entity_base_name}_direction_of_travel")
+    assert state.state == "arrived"
+
+    # remove tracked zone and move tracked entity
+    assert hass.states.async_remove("zone.home")
+    hass.states.async_set(
+        "device_tracker.test1",
+        "home",
+        {"friendly_name": "test1", "latitude": 2.2, "longitude": 1.2},
+    )
+    await hass.async_block_till_done()
+
+    # check sensor entities
+    state = hass.states.get("sensor.home_nearest_device")
+    assert state.state == STATE_UNKNOWN
+
+    entity_base_name = "sensor.home_test1"
+    state = hass.states.get(f"{entity_base_name}_distance")
+    assert state.state == STATE_UNAVAILABLE
+    state = hass.states.get(f"{entity_base_name}_direction_of_travel")
+    assert state.state == STATE_UNAVAILABLE