Remove deprecated siunitx binary-units command

Was removed in major release 3:

https://github.com/josephwright/siunitx/blob/main/CHANGELOG.md#v300

In v3, we no longer need to load this option. Commands like

\SI{1}{\giga\byte}

or

\SI{1}{\mega\bit}

just work.

Fixes #7

docker/tex/acp.cls

@@ -2560,8 +2560,6 @@
         % range-phrase={\,\text{--}\,},
         range-units=single,% single: Print unit only once, at end
         per-mode=symbol,
-        %
-        binary-units, % Allow "GB" for gigabyte etc., which isn't strictly SI but useful
     }%
     % Second setup step, with locales. See also
     % https://tex.stackexchange.com/a/46979/120853