Fix list labels in beamer.

This code (from the latex template) was causing bullets
and list numbers to extend beyond the left edge of the slide
in beamer.

Removing it seems to fix things.

default.beamer

@@ -41,12 +41,6 @@ $if(verbatim-in-note)$
 \usepackage{fancyvrb}
 $endif$
 $if(fancy-enums)$
-% Redefine labelwidth for lists; otherwise, the enumerate package will cause
-% markers to extend beyond the left margin.
-\makeatletter\AtBeginDocument{%
-  \renewcommand{\@listi}
-    {\setlength{\labelwidth}{4em}}
-}\makeatother
 \usepackage{enumerate}
 $endif$
 $if(tables)$