Remove bogus '$this->resource' from SES error handling pathway
Summary: Ref T10728. This property does not exist and is never referenced. The 'resource' key is also never referenced, so I believe this can be safely removed.
Test Plan: Will make @amckinley do my job for me.
Reviewed By: chad
Maniphest Tasks: T10728
Differential Revision: https://secure.phabricator.com/D15624