[search] Remove more dead code

[search] Remove more dead code

This code in SpecialSearch looks to still be around from the days where
there was a feature that go would send you to directly to an edit page,
rather than showing search results. That feature no longer exists, so
remove the related code.

Change-Id: If5b064b08a6258bfab31ab8f8b62c1d7283c8912