xmlsec1: remove backported patch

xmlsec1: remove backported patch

The backported host contamination fix for xmlsec1 can now be
removed since meta-oe now includes it.

Bug-AGL: SPEC-4051

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Iba5d2f35a36cd1a99825e165013c9f849cbd054c
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26629
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account