Remove conversion webhook from manifests

[Jooho]

What this PR does / why we need it:
At the moment, kserve does not have the conversion webhook so we don't need the conversion webhook related information from manifests

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes # #3344

Type of changes
Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Feature/Issue validation/testing:

Please describe the tests that you ran to verify your changes and relevant result summary. Provide instructions so it can be reproduced.
Please also list any relevant details for your test configuration.

• Test A

• Test B

• Logs

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Checklist:

• Have you added unit/e2e tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

Release note:

[terrytangyuan]

Instead of commenting out, we can probably remove them directly from the YAML.

[Jooho]

@terrytangyuan this is a kind of conversion webhook template and afaik, there is a plan to upgrade api version near future so I think it is okay to have the reference. However, I am okay with removing it for now.

[Jooho]

@ckadner could you please retrigger the failed test?

[terrytangyuan]

/retest

[ckadner]

Instead of commenting out, we can probably remove them directly from the YAML.

I would agree

@Jooho:

there is a plan to upgrade api version near future so I think it is okay to have the reference

would you have a link to an issue or Slack discussion? or maybe KServe meeting doc?

[Jooho]

@ckadner from meeting note, https://docs.google.com/document/d/1KZUURwr9MnHXqHA08TFbfVbM8EAJSJjmaMhnvstvi-k/edit

KServe 1.0 planning
Inference service v1beta1 -> v1
Serving runtime v1alpha1 -> v1beta1
Inference Graph v1alpha1 -> v1beta1

[Jooho]

@terrytangyuan @ckadner I deleted related parts and files.

[israel-hdez]

this is a kind of conversion webhook template and afaik, there is a plan to upgrade api version near future so I think it is okay to have the reference. However, I am okay with removing it for now.

I think we should be able to re-generate these artifacts with kubebuilder. So, I'm also +1 on removing.

[terrytangyuan]

/lgtm

[ckadner]

Looks good -- just one tiny nit pick on trailing whitespace

[yuzisun]

/lgtm
/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jooho, terrytangyuan, yuzisun

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