Create new ProfileField classes

- Create ProfileField model class
- Remove obsolete BaseCollection->models property

src/Model/ProfileField.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Friendica\Model;
+
+use Friendica\BaseModel;
+
+/**
+ * Custom profile field model class.
+ *
+ * Custom profile fields are user-created arbitrary profile fields that can be assigned a permission set to restrict its
+ * display to specific Friendica contacts as it requires magic authentication to work.
+ *
+ * @property int    uid
+ * @property int    order
+ * @property int    psid
+ * @property string label
+ * @property string value
+ * @property string created
+ * @property string edited
+ */
+class ProfileField extends BaseModel
+{
+
+}