fix(release): drop stale launcher tui goreleaser target

scripts/test-goreleaser-build-mains.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+CONFIG_FILE="${ROOT_DIR}/.goreleaser.yaml"
+
+failed=0
+while IFS= read -r main_path; do
+  main_path="${main_path#./}"
+  if [ ! -e "${ROOT_DIR}/${main_path}" ]; then
+    echo "missing goreleaser build main: ${main_path}" >&2
+    failed=1
+  fi
+done < <(sed -n 's/^[[:space:]]*main:[[:space:]]*//p' "${CONFIG_FILE}")
+
+if [ "${failed}" -ne 0 ]; then
+  exit 1
+fi
+
+echo "all goreleaser build mains exist"