[BREAK CHANGE]: remove legacy adopt existing configs

[ericsyh]

Signed-off-by: ericsyh [email protected]

(If this PR fixes a github issue, please add Fixes #<xyz>.)

Fixes #820

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Master Issue: #

Motivation

Remove adopt existing configs.

Modifications

Remove adopt existing configs.

Verifying this change

• [x] Make sure that the change passes the CI checks.

(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

(or)

This change is already covered by existing tests, such as (please describe tests).

(or)

This change added tests and can be verified as follows:

(example:)

• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

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Need to update docs?

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• [ ] doc

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[github-actions[bot]]

@ericsyh:Thanks for your contribution. For this PR, do we need to update docs? (The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[MarvinCai]

shall we also remove all manifests related to this?

[ericsyh]

shall we also remove all manifests related to this?

@MarvinCai Yeah, sure. I missed it. Will update to remove manifests.

[ericsyh]

@MarvinCai PTAL https://github.com/streamnative/charts/pull/739/commits/742b55dc9caf7fad9955e0b356ba3461c5b6d33f

[fantapsody]

@ericsyh We may need to keep this part for a while as we have recently found that some customers are using these options.