[release-branch.go1.4] [release-branch.go1.4] encoding/xml: remove SyntaxError.Byte

««« CL 182580043 / 2d1ab17a670a
encoding/xml: remove SyntaxError.Byte

It is unused. It was introduced in the CL that added InputOffset.
I suspect it was an editing mistake.

LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://codereview.appspot.com/182580043
»»»

TBR=bradfitz
CC=golang-codereviews
https://codereview.appspot.com/180630043