go.core: Remove more uses of verror1.

The error created under veyron2/security/... is no longer used
anywhere, so I've simply removed it.

The errors under veyron2/vom/... are local errors that don't need
to use verror (1 or 2), so I've changed them to fmt.Errorf.

Change-Id: I549e2db5780c3401263c97dcbb0851381145ffba
MultiPart: 1/2
8 files changed
tree: 38f09cba5ca84d0512877fc8aaab2109866d85a9
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/