refactor: remove SendsWebhook interface

Simplified webhook channel implementation to match TelegramChannel pattern without typed interface.

Changes:
- Removed SendsWebhook interface file
- Removed interface from Team model
- Removed routeNotificationForWebhook() method
- WebhookChannel now uses untyped $notifiable like TelegramChannel

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/Models/Team.php

@@ -7,7 +7,6 @@
 use App\Notifications\Channels\SendsEmail;
 use App\Notifications\Channels\SendsPushover;
 use App\Notifications\Channels\SendsSlack;
-use App\Notifications\Channels\SendsWebhook;
 use App\Traits\HasNotificationSettings;
 use App\Traits\HasSafeStringAttribute;
 use Illuminate\Database\Eloquent\Casts\Attribute;
@@ -37,7 +36,7 @@
     ]
 )]
 
-class Team extends Model implements SendsDiscord, SendsEmail, SendsPushover, SendsSlack, SendsWebhook
+class Team extends Model implements SendsDiscord, SendsEmail, SendsPushover, SendsSlack
 {
     use HasFactory, HasNotificationSettings, HasSafeStringAttribute, Notifiable;
 
@@ -167,11 +166,6 @@ public function routeNotificationForPushover()
         ];
     }
 
-    public function routeNotificationForWebhook()
-    {
-        return data_get($this, 'webhook_url', null);
-    }
-
     public function getRecipients(): array
     {
         $recipients = $this->members()->pluck('email')->toArray();

app/Notifications/Channels/SendsWebhook.php

@@ -1,8 +0,0 @@
-<?php
-
-namespace App\Notifications\Channels;
-
-interface SendsWebhook
-{
-    public function routeNotificationForWebhook();
-}

app/Notifications/Channels/WebhookChannel.php

@@ -10,7 +10,7 @@ class WebhookChannel
     /**
      * Send the given notification.
      */
-    public function send(SendsWebhook $notifiable, Notification $notification): void
+    public function send($notifiable, Notification $notification): void
     {
         $webhookSettings = $notifiable->webhookNotificationSettings;