Removed Deprecated Getter and Setters

- Removed Deprecated Getter Setters from all Model Classes
- All Camelcase getters and setters are removed. Please use first letter uppercase syntax
- E.g. instead of using get_notify_url(), use getNotifyUrl() instead

lib/PayPal/Api/PaymentHistory.php

@@ -90,29 +90,4 @@ class PaymentHistory extends PayPalModel
         return $this->next_id;
     }
 
-    /**
-     * Identifier of the next element to get the next range of results.
-     *
-     * @deprecated Instead use setNextId
-     *
-     * @param string $next_id
-     * @return $this
-     */
-    public function setNext_id($next_id)
-    {
-        $this->next_id = $next_id;
-        return $this;
-    }
-
-    /**
-     * Identifier of the next element to get the next range of results.
-     * @deprecated Instead use getNextId
-     *
-     * @return string
-     */
-    public function getNext_id()
-    {
-        return $this->next_id;
-    }
-
 }