fix: Remove duplicate CORS handling from aiohttp app

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

main.py

@@ -19,7 +19,6 @@ import json
 import time
 import requests
 from aiohttp import web, ClientSession, ClientError
-import aiohttp_cors
 import aiomqtt
 from datetime import datetime, timedelta
 import pytz
@@ -595,19 +594,10 @@ def task_died(future):
     exit()
 
 if __name__ == '__main__':
-    cors = aiohttp_cors.setup(app, defaults={
-        "*": aiohttp_cors.ResourceOptions(
-            allow_credentials=True,
-            expose_headers="*",
-            allow_headers="*",
-        )
-    })
-
     app.router.add_get('/', index)
     app.router.add_post('/owntracks', owntracks)
     app.router.add_get('/history/{measurement}/{name}', history)
-    search_route = app.router.add_post('/search/{measurement}/{name}', search)
-    cors.add(search_route)
+    app.router.add_post('/search/{measurement}/{name}', search)
     app.router.add_get('/latest', latest)
 
     sensors.add(ThermostatSensor('thermostat2', '192.168.69.152', 'Venstar'))