Remove the "exclude archived snippets" from the snippets fetching code.

Archived snippets are snippets that where replaced by another set of snippets that where fetched in the following background fetch. They are different from the set of the dismissed snippets (which are always excluded).

Exculding archived snippets seems to have essentally no effect. In order to simplify the code this is removed.

FYI: Due to refactorings the only code path that is no executed was to always exclude them. As mentioned above this CL is more agressive.

BUG=none

Review-Url: https://codereview.chromium.org/2520993002
Cr-Commit-Position: refs/heads/master@{#433852}
2 files changed