Remove expected attributes from deleting session.

[JDutil]

Fixes #10

I would merge #9 first as that fixes the specs. The failure here is currently on master branch.

[cjyclaire]

Hmm taking a second look at the diff, the ServiceError change looks good to me, yet for user agent diff and spec diff, may I ask are they causing trouble for you?

[JDutil]

@cjyclaire no they aren't and I'm not sure why they are in the diff. I tried updating this PR last night with latest work and noticed these unrelated diffs being included, and was too tired to work on fixing at the time. I'll revisit this to clean up the diff.

Also FYI I'm not sure that #15 was configured correctly because these commits didn't trigger any build, but maybe that's because this is an older PR? Perhaps I need to reopen a new one to get it to build once I clean up the diff?

[cjyclaire]

Hmm, weird, you can open a new one if it gets messy ; ) I'll take a look and merge it. Thanks!

[JDutil]

For some reason this PR doesn't even include the main fix anymore...

Essentially all I wanted to do was change:

# @return [Hash] Options for deleting session.
def delete_opts(sid)
     merge_all(table_opts(sid), expected_attributes(sid))
end

to

# @return [Hash] Options for deleting session.
def delete_opts(sid)
      table_opts(sid)
end

When deleting records there is no reason to ensure they have those expected_attributes we can just delete the record.

[JDutil]

Closing for now until I get a chance to fix up this PR as intended again.