[OS X TeX] r.tex?

[Alain Schremmer]

On January 5, 2005, 10:57 AM, a file called r.tex appeared along with 
book.tex, book.aux, book.idx etc. I finally opened it to see what was in 
it and here it is below, in its entirety.
What does it do and do I have to keep it as it does not seem to have 
ever been upgraded.
Regards
--schremmer


\relax
\@setckpt{00ArithIntro/00w}{
\setcounter{page}{1}
\setcounter{equation}{0}
\setcounter{enumi}{0}
\setcounter{enumii}{0}
\setcounter{enumiii}{0}
\setcounter{enumiv}{0}
\setcounter{footnote}{2}
\setcounter{mpfootnote}{0}
\setcounter{part}{0}
\setcounter{chapter}{0}
\setcounter{section}{0}
\setcounter{subsection}{0}
\setcounter{subsubsection}{0}
\setcounter{paragraph}{0}
\setcounter{subparagraph}{0}
\setcounter{figure}{0}
\setcounter{table}{0}
\setcounter{float at type}{4}
\setcounter{parentequation}{0}
\setcounter{NAT at ctr}{0}
\setcounter{FancyVerbLine}{0}
\setcounter{vrcnt}{0}
\setcounter{thm}{0}
\setcounter{defn}{0}
\setcounter{xpl}{0}
}

It does not seem to be upgraded. So, the main question is do I have to 
keep it and
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