Retire Niels Mündler from Fronius codeowners (#102639)

CODEOWNERS

@@ -423,8 +423,8 @@ build.json @home-assistant/supervisor
 /tests/components/fritzbox/ @mib1185 @flabbamann
 /homeassistant/components/fritzbox_callmonitor/ @cdce8p
 /tests/components/fritzbox_callmonitor/ @cdce8p
-/homeassistant/components/fronius/ @nielstron @farmio
-/tests/components/fronius/ @nielstron @farmio
+/homeassistant/components/fronius/ @farmio
+/tests/components/fronius/ @farmio
 /homeassistant/components/frontend/ @home-assistant/frontend
 /tests/components/frontend/ @home-assistant/frontend
 /homeassistant/components/frontier_silicon/ @wlcrs

homeassistant/components/fronius/manifest.json

@@ -1,7 +1,7 @@
 {
   "domain": "fronius",
   "name": "Fronius",
-  "codeowners": ["@nielstron", "@farmio"],
+  "codeowners": ["@farmio"],
   "config_flow": true,
   "dhcp": [
     {