cleanup!: remove deprecated entities from March

Affects 6 devices:
  - Electriq DES91W dehumidifier (original, and v2)
  - Globe ceiling fan with RGBCW light
  - Haier air-water heat pump
  - Klarstein Bornholm Smart heater

custom_components/tuya_local/devices/electriq_desd9lw_dehumidifier.yaml

@@ -75,13 +75,6 @@ entities:
         range:
           min: 16
           max: 30
-  - entity: light
-    name: UV sterilization
-    deprecated: switch.uv_sterilization  # 2026-03-02
-    dps:
-      - id: 15
-        name: switch
-        type: boolean
   - entity: switch
     translation_key: uv_sterilization
     dps:

custom_components/tuya_local/devices/electriq_desd9lwv2_dehumidifier.yaml

@@ -70,13 +70,6 @@ entities:
         range:
           min: 16
           max: 30
-  - entity: light
-    name: UV sterilization
-    deprecated: switch.uv_sterilization  # 2026-03-02
-    dps:
-      - id: 15
-        name: switch
-        type: boolean
   - entity: switch
     translation_key: uv_sterilization
     dps:

custom_components/tuya_local/devices/globe_ceilingfanrgbcwlight.yaml

@@ -86,13 +86,6 @@ entities:
       - id: 34
         type: boolean
         name: switch
-  - entity: switch
-    name: Nightlight
-    deprecated: light.nightlight  # 2026-03-02
-    dps:
-      - id: 53
-        type: boolean
-        name: switch
   - entity: light
     translation_key: nightlight
     dps:

custom_components/tuya_local/devices/haier_airwater_heatpump.yaml

@@ -78,17 +78,6 @@ entities:
         optional: true
         mask: "00FF"
         name: minute
-  - entity: text
-    name: Time
-    category: config
-    icon: "mdi:clock"
-    hidden: true
-    deprecated: time  # 2026-03-17
-    dps:
-      - id: 103
-        type: base64
-        optional: true
-        name: value
   - entity: text
     name: Program 1
     category: config

custom_components/tuya_local/devices/klarstein_bornholm_smart_heater.yaml

@@ -63,19 +63,6 @@ entities:
             value: false
           - dps_val: false
             value: true
-  - entity: light
-    name: Display light
-    deprecated: light.backlight  # 2026-03-02
-    category: config
-    dps:
-      - id: 102
-        type: boolean
-        name: switch
-        mapping:
-          - dps_val: true
-            value: false
-          - dps_val: false
-            value: true
   - entity: light
     translation_key: backlight
     category: config