Revert "fix: resolve PHPStan static analysis warnings"

This reverts commit 2d3e4b4a95.

app/Models/TicketMessage.php

@@ -3,20 +3,7 @@
 namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
-use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
-/**
- * App\Models\TicketMessage
- *
- * @property int $id
- * @property int $ticket_id
- * @property int $user_id
- * @property string $message
- * @property \Illuminate\Support\Carbon $created_at
- * @property \Illuminate\Support\Carbon $updated_at
- * @property-read \App\Models\Ticket $ticket 关联的工单
- * @property-read bool $is_me 当前消息是否由工单发起人发送
- */
 class TicketMessage extends Model
 {
     protected $table = 'v2_ticket_message';
@@ -26,22 +13,4 @@ class TicketMessage extends Model
         'created_at' => 'timestamp',
         'updated_at' => 'timestamp'
     ];
-
-    protected $appends = ['is_me'];
-
-    /**
-     * 关联的工单
-     */
-    public function ticket(): BelongsTo
-    {
-        return $this->belongsTo(Ticket::class, 'ticket_id', 'id');
-    }
-
-    /**
-     * 判断消息是否由工单发起人发送
-     */
-    public function getIsMeAttribute(): bool
-    {
-        return $this->ticket->user_id === $this->user_id;
-    }
 }