Remove libxml Visual Studio fix patch

This removes a libxml patch we have which now makes merge conflicts with
the latest libxml commits.

The patch is for a bug in visual studio here:
https://connect.microsoft.com/VisualStudio/feedback/details/2582138
The link doesn't work anymore but is probably fixed. Either way, there
is an automated test which will catch the relevant bug if it is still
reproduces: fast/xsl/xslt-translate.html

Bug: 599427
Change-Id: I09f9fe27dbfcf79f762406810a5ccf09d606d7de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3428248
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Cr-Commit-Position: refs/heads/main@{#965730}
NOKEYCHECK=True
GitOrigin-RevId: 2db8d5ac301455cb6c1448d3be16ecce122f03b1
4 files changed