Remove modbus codeowner, and downgrade to quality "No score" (#122010)

Co-authored-by: Franck Nijhof <git@frenck.dev>

CODEOWNERS

@@ -884,8 +884,6 @@ build.json @home-assistant/supervisor
 /tests/components/moat/ @bdraco
 /homeassistant/components/mobile_app/ @home-assistant/core
 /tests/components/mobile_app/ @home-assistant/core
-/homeassistant/components/modbus/ @janiversen
-/tests/components/modbus/ @janiversen
 /homeassistant/components/modem_callerid/ @tkdrob
 /tests/components/modem_callerid/ @tkdrob
 /homeassistant/components/modern_forms/ @wonderslug

homeassistant/components/modbus/manifest.json

@@ -1,10 +1,10 @@
 {
   "domain": "modbus",
   "name": "Modbus",
-  "codeowners": ["@janiversen"],
+  "codeowners": [],
   "documentation": "https://www.home-assistant.io/integrations/modbus",
   "iot_class": "local_polling",
   "loggers": ["pymodbus"],
-  "quality_scale": "platinum",
+  "quality_scale": "silver",
   "requirements": ["pymodbus==3.6.9"]
 }

script/hassfest/manifest.py

@@ -120,10 +120,6 @@ NO_DIAGNOSTICS = [
     "gdacs",
     "geonetnz_quakes",
     "hyperion",
-    # Modbus is excluded because it doesn't have to have a config flow
-    # according to ADR-0010, since it's a protocol integration. This
-    # means that it can't implement diagnostics.
-    "modbus",
     "nightscout",
     "pvpc_hourly_pricing",
     "risco",