fix(icons): remove duplicate displayoff key (#5175)

Co-authored-by: Yuris Auzins <zuz666@users.noreply.github.com>

custom_components/tuya_local/icons.json

@@ -325,7 +325,6 @@
                             "high": "mdi:fan-speed-3",
                             "medium": "mdi:fan-speed-2",
                             "low": "mdi:fan-speed--1",
-                            "displayoff": "mdi:monitor-off",
                             "off": "mdi:fan-off"
                         }
                     }