Fix lint

Signed-off-by: George Robinson <[email protected]>

silence/silence.go

@@ -641,11 +641,7 @@ func (s *Silences) Set(sil *pb.Silence) error {
 		sil.StartsAt = now
 	}
 
-	if err = s.setSilence(sil, now, false); err != nil {
-		return err
-	}
-
-	return nil
+	return s.setSilence(sil, now, false)
 }
 
 // canUpdate returns true if silence a can be updated to b without