These are redundant with checking x.Sym.Pkg == localpkg.

Passes toolstash-check -all.

Change-Id: Iebe25f7932cd15a036141b468ad75c239abcdcf7
Reviewed-on: https://go-review.googlesource.com/66670
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>