Remove obsolete upstream release workflows

script/linux/bundle

@@ -151,9 +151,8 @@ if [[ "$CARGO_PROFILE" == "dev" ]]; then
 else
   CARGO_TARGET_OUTPUT_DIR="$CARGO_TARGET_OUTPUT_ROOT/$CARGO_PROFILE"
 fi
-# NOTE: if you change this path, update the "Clean stale bundle output"
-# steps in .github/workflows/create_release.yml so they continue to wipe
-# stale packages left in the shared Namespace runner cache.
+# Packaging jobs that reuse this output directory must clear stale packages
+# before collecting artifacts for a new build.
 OUT_DIR="$CARGO_TARGET_OUTPUT_DIR/bundle/linux"
 mkdir -p "$OUT_DIR"