[#137004] Move chart string expiration updater out of main app (#1161)
[#137004] Move chart string expiration updater out of main app (#1161)

It's only used by NU. It's moved into an NU-specific engine in https://github.com/tablexi/nucore-nu/pull/289
tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open