[tex-eplain] turning off indexing

[John Frampton]

I have looked in the EPlain documentation for a way to turn off 
indexing.  I don't like all that writing to the index file going 
on every time I run Tex.  And I certainly don't want to see all 
the reports of reading the .tmp file.  To this point, I've just 
used \idx and \sidx, so the following hack kills the writing and 
.tmp file use (but does not stop opening the .idx file for writing).

\def\noindex{%
    \let\idx\relax
    \def\sidx##1{\@getoptionalarg\relax}%
}

Am I missing something?

Thanks,
John Frampton