kpt live apply doc claims --poll-period is supported, but it's not

[tgjonestx]

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Expected behavior

kpt live apply --help does not include descriptions of unsupported arguments

Actual behavior

/ # kpt live apply --poll-period=10s
error: unknown flag: --poll-period
/ # kpt live apply --help | grep poll-period
  --poll-period:
  $ kpt live apply --reconcile-timeout=15m --poll-period=5s my-dir

Information

The --poll-period command line option was supported in kpt v1.0.0-beta.15; it's not supported in v1.0.0-beta.19, but I'm not sure when support was dropped.

Suggestion - I know that beta means that there will be breaking changes, but it would be a little bit easier for users to adopt new versions if the release notes called out breaking changes.

Steps to reproduce the behavior

Run kpt live apply --poll-period=10s

[mortent]

Yeah, this is a leftover from when kpt used polling for checking status for resources during apply. We recently switched to using watches for this, so the poll-period is no longer necessary. Thanks for reporting this and I'll make sure the documentation is updated.