Avoid refcheck showing section numbers in bibliography in final document

I used refcheck while writing my document to see uncited refrences in bibliography.
However now I want my final document which still shows these numbers in bibliography even if I comment the refcheck package.

here is my preamble

begin[two sided,12pt]{book}
%usepackage{refcheck}
usepackage[authoryear,sort]{natbib}
usepackage[breaklinks=True,backref]{hyperref}
other packages

begin{document}
title
mainmatter

bibliographystyle{agsm}
bibliography{ref}
end{document}