Fix #575: Replaced deprecated utils.Unmarshal and removed unused variables

[ShivanshuGupta07]

Description

This PR fixes #575 by replacing deprecated utils.Unmarshal with json.Unmarshal and removing unused variables from the codebase.

Notes for Reviewers

• The changes involve updates to two specific files: config/provider/inmem.go and utils/kubernetes/crd.go.
• Please verify that the replacement of utils.Unmarshal does not impact any other parts of the code that may rely on its specific behavior.

Signed commits

• [x] Yes, I signed my commits.

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[leecalcote]

Thank you, @ShivanshuGupta07!

[MUzairS15]

@ShivanshuGupta07 merge conflicts

[ShivanshuGupta07]

@MUzairS15, so no changes are required now?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue is being automatically closed due to inactivity. However, you may choose to reopen this issue.