Removed Base.randsym, which is undefined.

There is a symbol `randsym` exported from Base, but not defined. It appears in `names(Base)`. It also has the following tab completion behavior:
~~~
julia> Base.rands
Base.randsym     Base.randstring  
julia> Base.randsym
ERROR: randsym not defined
~~~

I couldn't find any trace of it in base, other than these two exports. I assume it was just removed/renamed at some point?