Add [[maybe_unused]] to silence unhelpful warnings

handlers/handlerinvalidaction.cpp

@@ -20,12 +20,12 @@ SOFTWARE.
 */
 #include "handlerinvalidaction.h"
 
-Response HandlerInvalidAction::handleRequest(const Request &r)
+Response HandlerInvalidAction::handleRequest([[maybe_unused]] const Request &r)
 {
 	return errorResponse("Invalid action", "No action defined for this action");
 }
 
-bool HandlerInvalidAction::canAccess(const Permissions &perms)
+bool HandlerInvalidAction::canAccess([[maybe_unused]] const Permissions &perms)
 {
 	return true;
 }