Stop deleting chelsio addresses during uninstall (#2953)

## Before this PR

Running on rack2 and calling `omicron-package uninstall` would involve a
fatal termination of the connection, as it would delete the `cxgbe0/ll`
and `cxgbe1/ll` IP addresses necessary for contacting the sled.

## After this PR

Those addresses are left alone. This is pretty useful for development,
as it allows us to run `uninstall` to cleanly wipe a Gimlet, preparing
it for future "clean installs".

sled-hardware/src/cleanup.rs

@@ -6,11 +6,11 @@
 
 use anyhow::Error;
 use futures::stream::{self, StreamExt, TryStreamExt};
+use illumos_utils::dladm::Dladm;
 use illumos_utils::dladm::BOOTSTRAP_ETHERSTUB_NAME;
 use illumos_utils::dladm::BOOTSTRAP_ETHERSTUB_VNIC_NAME;
 use illumos_utils::dladm::UNDERLAY_ETHERSTUB_NAME;
 use illumos_utils::dladm::UNDERLAY_ETHERSTUB_VNIC_NAME;
-use illumos_utils::dladm::{Dladm, VnicSource};
 use illumos_utils::link::LinkKind;
 use illumos_utils::opte;
 use illumos_utils::zone::IPADM;
@@ -30,14 +30,6 @@ pub fn delete_bootstrap_addresses(log: &Logger) -> Result<(), Error> {
     delete_addresses_matching_prefixes(log, &[bootstrap_prefix])
 }
 
-fn delete_chelsio_addresses(log: &Logger) -> Result<(), Error> {
-    let prefixes = crate::underlay::find_chelsio_links()?
-        .into_iter()
-        .map(|link| format!("{}/", link.name()))
-        .collect::<Vec<_>>();
-    delete_addresses_matching_prefixes(log, &prefixes)
-}
-
 fn delete_addresses_matching_prefixes(
     log: &Logger,
     prefixes: &[String],
@@ -112,7 +104,6 @@ pub async fn delete_omicron_vnics(log: &Logger) -> Result<(), Error> {
 pub async fn cleanup_networking_resources(log: &Logger) -> Result<(), Error> {
     delete_underlay_addresses(log)?;
     delete_bootstrap_addresses(log)?;
-    delete_chelsio_addresses(log)?;
     delete_omicron_vnics(log).await?;
     delete_etherstub(log)?;
     opte::delete_all_xde_devices(log)?;