tests: Manually remove libxml2 on MSYS2 runners

lcitool doesn't support MSYS2 targets, so manually remove
this now unnecessary library.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220121154134.315047-7-f4bug@amsat.org>
Message-Id: <20220204204335.1689602-11-alex.bennee@linaro.org>

.cirrus.yml

@@ -32,7 +32,6 @@ windows_msys2_task:
       mingw-w64-x86_64-libgcrypt
       mingw-w64-x86_64-libpng
       mingw-w64-x86_64-libssh
-      mingw-w64-x86_64-libxml2
       mingw-w64-x86_64-snappy
       mingw-w64-x86_64-libusb
       mingw-w64-x86_64-usbredir

.gitlab-ci.d/windows.yml

@@ -44,7 +44,6 @@ msys2-64bit:
       mingw-w64-x86_64-libssh
       mingw-w64-x86_64-libtasn1
       mingw-w64-x86_64-libusb
-      mingw-w64-x86_64-libxml2
       mingw-w64-x86_64-nettle
       mingw-w64-x86_64-ninja
       mingw-w64-x86_64-pixman
@@ -80,7 +79,6 @@ msys2-32bit:
       mingw-w64-i686-libssh
       mingw-w64-i686-libtasn1
       mingw-w64-i686-libusb
-      mingw-w64-i686-libxml2
       mingw-w64-i686-lzo2
       mingw-w64-i686-ninja
       mingw-w64-i686-pixman