Remove @return void

lib/SimpleSAML/Auth/ProcessingChain.php

lib/SimpleSAML/Auth/ProcessingFilter.php

lib/SimpleSAML/Auth/Simple.php

lib/SimpleSAML/Auth/Source.php

lib/SimpleSAML/Auth/State.php

lib/SimpleSAML/Command/RouterDebugCommand.php

lib/SimpleSAML/Configuration.php

lib/SimpleSAML/Error/Assertion.php

lib/SimpleSAML/Error/Error.php

lib/SimpleSAML/Error/Exception.php

lib/SimpleSAML/IdP.php

lib/SimpleSAML/IdP/IFrameLogoutHandler.php

lib/SimpleSAML/IdP/LogoutHandlerInterface.php

lib/SimpleSAML/IdP/TraditionalLogoutHandler.php

lib/SimpleSAML/Kernel.php

lib/SimpleSAML/Locale/Language.php

lib/SimpleSAML/Locale/Localization.php

lib/SimpleSAML/Locale/Translate.php

lib/SimpleSAML/Logger.php

lib/SimpleSAML/Logger/ErrorLogLoggingHandler.php