Comment supprimer l'adresse du laboratoire dans l'abstract

\documentclass{yathesis}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\laboratory[logo=,tel=, url=]{un laboratoire de recherche}{ et l'adresse du laboratoire de     recherche}

\makeatletter
\renewcommand{\makeabstract}{%
  \ifbool{YAD@nomakeabstract}{%
  }{%
    \YAD@alarm@noabstract%
  }%
  \pagestyle{preliminary}%
  \YAD@phantomsection%
  \addcontentsline{toc}{chapter}{\abstractname}%
  \booltrue{YAD@makeabstract@used}%
  \bgroup%
  % \setlength{\footskip}{-15pt}%
  \setfootrule{0pt}%
  \setfoot[][%
  \ifboolexpr{%
    bool {YAD@inprogress@work}%
    or bool {YAD@inprogress@work@star}%
  }{%
    \textsc{\translate{lbl-inprogressfoottext} \today}%
  }{%
    \ifboolexpr{%
      bool {YAD@submitted@work@star}%
    }{%
      \textsc{\translate{lbl-submittedfoottext} \today}%
    }{%
    }%
  }%
  ][]{%
%    \YAD@laboratory@abstract@page%
  }{}{}%
  \cleardoublepage%
  \renewcommand{\YAD@chapter@header}{\abstractname}%
  \renewcommand{\YAD@section@header}{\abstractname}%
  \YAD@abstract@page%
  \cleardoublepage%
  \egroup%
  \YAD@nolaboratorytrue%
  \YAD@nolaboratoryadresstrue%
}%
\makeatother

\begin{document}
\author{John}{Doe}

\supervisor{Jane}{Doe}

\maketitle%

\begin{abstract}
 blabla
 blabla
\end{abstract}
\makeabstract
\end{document}