Remove superfluous and misleading import of Criterion.MultiMap in the example of defaultMainWithSource
Remove superfluous and misleading import of Criterion.MultiMap in the example of defaultMainWithSource

The example in the documentation for Criterion.Main.defaultMainWithSource is
invalid due to an import of Criterion.MultiMap which was removed in #4224289a
and isn't necessary for the given example anymore.

bos/criterion,bgamari/criterion,bos/criterion,paulolieuthier/criterion,bos/criterion,paulolieuthier/criterion,iu-parfunc/criterion,rrnewton/criterion,paulolieuthier/criterion,iu-parfunc/criterion,rrnewton/criterion,osa1/criterion,rrnewton/criterion,bgamari/criterion,iu-parfunc/criterion,bgamari/criterion,osa1/criterion