remove codeigniter

app/Models/ParentNotification.php

@@ -8,7 +8,7 @@ class ParentNotification extends BaseModel
 {
     protected $table = 'parent_notifications';
 
-    // ✅ CI: useTimestamps = true (created_at/updated_at)
+    // ✅ legacy: useTimestamps = true (created_at/updated_at)
     public $timestamps = true;
 
     protected $fillable = [
@@ -26,7 +26,7 @@ class ParentNotification extends BaseModel
 
     protected $casts = [
         'student_id'    => 'integer',
-        // incident_date is stored as Y-m-d in CI usage
+        // incident_date is stored as Y-m-d in legacy usage
         'incident_date' => 'date',
     ];
 
@@ -37,7 +37,7 @@ class ParentNotification extends BaseModel
     }
 
     /**
-     * Equivalent of CI hasSent()
+     * Equivalent of legacy hasSent()
      */
     public static function hasSent(
         int $studentId,