fix: remove $insertID in template

Author: kenjis

system/Commands/Generators/Views/model.tpl.php

@@ -10,7 +10,6 @@ class {class} extends Model
     protected $table            = '{table}';
     protected $primaryKey       = 'id';
     protected $useAutoIncrement = true;
-    protected $insertID         = 0;
     protected $returnType       = {return};
     protected $useSoftDeletes   = false;
     protected $protectFields    = true;