Remove superfluous @throws annotations

[jdreesen]

As the method catches these exceptions and returns false in this case, those annotations are wrong because those exceptions are never thrown from this method.

Since I'm not sure what your merge strategy is between version branches, I just picked the oldest version I could find the code in.

[elasticmachine]

Since this is a community submitted pull request, a Jenkins build has not been kicked off automatically. Can an Elastic organization member please verify the contents of this patch and then kick off a build manually?