Do not use `noneuehaas` in `example/mu/example.dtx`

example/mu/example.dtx

@@ -24,10 +24,6 @@
   nosansbold,  %% The `nosansbold` option prevents the use of the
                %% sans-serif type face for bold text. Replace with
                %% `sansbold` to use sans-serif type face for bold text.
-  noneuehaas,  %% The `noneuehaas` option prevents the use of the
-               %% sans-serif font family Neue Haas (TeX Gyre Heros) as
-               %% the main sans-serif font. Replace with `neuehaas` to 
-               %% use the Neue Haas as the main sans-serif font.
   nocolorbold, %% The `nocolorbold` option disables the usage of the 
                %% blue color for bold text, instead using black. Replace
                %% with `colorbold` to use blue for bold text.