Adds noop for set_customer_session_cookie. (#710)

* Added noop for set_customer_session_cookie.

* fixup! Added noop for set_customer_session_cookie.

---------

Co-authored-by: Andres A <[email protected]>

Author: creative-andrew

includes/utils/class-ql-session-handler.php

@@ -416,4 +416,14 @@ public function reload_data() {
 		\WC_Cache_Helper::invalidate_cache_group( WC_SESSION_CACHE_GROUP );
 		$this->_data = $this->get_session( $this->_customer_id );
 	}
+
+	/**
+	 * Noop for \WC_Session_Handler method.
+	 *
+	 * Prevents potential crticial errors when calling this method.
+	 *
+	 * @param bool $set Should the session cookie be set.
+	 */
+	public function set_customer_session_cookie( $set ) {}
+
 }