You can call the document class with the anonymous option. However, this removes all identification of the author(s), printing the author(s) as ANONYMOUS AUTHOR(S).
You can also just set a special macro to \@empty:
\makeatletter
\let\@authorsaddresses\@empty
\makeatother
The above is used in a condition to check whether an author address is supplied. However, the entire footnote is set based on this condition, and therefore setting \@authorsaddresses to \@empty skips the process of setting the footnote containing the author credentials.

\documentclass{acmart}
\title{A title}
\author{An author}
\address{An address}
\email{who@cares.com}
\makeatletter
\let\@authorsaddresses\@empty
\makeatother
\begin{document}
\maketitle
\end{document}