configure: remove slirp submodule support that doesn't exist yet
The slirp code is not yet split off into a separate repository, so
configuring QEMU to use slirp as a submodule is premature. This
causes the non-existant "slirp" to be requested from git when syncing
submodules. This in turn appears to be cause of non-deterministic
failures some developers are seeing with QEMU's submodule sync process.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <
20190313173157.30504-1-berrange@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>