Remove deprecated methods in Utils class

[manusa]

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Description

Part of #5778

The following methods must be removed from Utils:

• getPluralFromKind(String kind) https://github.com/fabric8io/kubernetes-client/blob/e0647d70f528e5d043f2827f1a6b81055c3302fc/kubernetes-client-api/src/main/java/io/fabric8/kubernetes/client/utils/Utils.java#L350-L351

Dependencies must be updated accordingly.

[stale[bot]]

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!

[vaidikcode]

@manusa, how should we handle the use of this method in kubernetes-client-api/src/main/java/io/fabric8/kubernetes/client/dsl/base/ResourceDefinitionContext.java within the protected void validate method?

[manusa]

This needs to be evaluated:

• #6313
• #6314

It's unclear if we still want to remove it or not.