Make legacy/pre-proxysql.bash a no-op

test/tap/groups/legacy/pre-proxysql.bash

@@ -1,18 +1,3 @@
 #!/usr/bin/env bash
-set -e
-set -o pipefail
-#
-# Legacy pre-proxysql hook.
-#
-# Cluster startup is now handled by start-proxysql-isolated.bash.
-# This hook only needs to wait for the cluster to stabilize.
-#
-
-NUM_NODES=${PROXYSQL_CLUSTER_NODES:-9}
-if [[ "${SKIP_CLUSTER_START}" == "1" ]] || [[ "${SKIP_CLUSTER_START}" == "true" ]] || [[ "${NUM_NODES}" == "0" ]]; then
-    echo "[$(date '+%Y-%m-%d %H:%M:%S')] >>> Pre-proxysql: no cluster, nothing to do."
-    exit 0
-fi
-
-echo "[$(date '+%Y-%m-%d %H:%M:%S')] >>> Pre-proxysql: waiting for cluster to stabilize..."
-sleep 10
+# No-op: cluster startup is handled by start-proxysql-isolated.bash
+exit 0