Remove unused task to reset the vote counters
Remove unused task to reset the vote counters

This task was added in commit 2b9b78e38. According to the notes in the
pull request introducing the change:

> If you have had [map validations] in production, you might want to run
> the rake task votes:reset_vote_counter to reset the cached votes
> counter. Otherwise, until there is another vote for a proposal, the
> counter will not be updated, and there might be some votes which are
> not yet displayed

In short, this was a task that was introduced for a specific release and
had to be run manually. So we can remove it now.

consul/consul,consul/consul,consul/consul,consul/consul,consul/consul