remove unused util code

[tg123]

• remove duplicated generic code which impled
• remove unfinished cache/informer code (still missing informer reflector ...)

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[tg123]

#846

[koepalex]

We used in our code the GenericKubernetesApi to watch kubernetes resources (namespaces scoped and global), this class was removed from nuget 9.0.x

// constructor
_genericClient = new GenericClient(_kubernetesClient, GROUP, VERSION, PLURAL);
_genericKubernetesApi = new GenericKubernetesApi(GROUP, VERSION, PLURAL, _kubernetesClient);
// later
var watcher = _genericKubernetesApi.Watch(NAMESPACE, onEvent, onError, onClosed, cancellationToken);

We are using this approach to be able to reconnect when the connection is lost (onClosed) and for the error logging. With removing of the API, I think we need to change to, the way shown in Watch Example.

But how can we deal with reconnect and error logging in that case?

[tg123]

thanks for reporting, will add watch as requested

[brendandburns]

@tg123 will watch be added to this PR? Or in a follow up?

[tg123]

@tg123 will watch be added to this PR? Or in a follow up?

lets do it in followup

[brendandburns]

/lgtm /approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

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