🐛 Remove TotalRequests Prometheus metrics as it is not getting used

[prafull01]

This PR is for the issue #712 TotalRequests prometheus metrics is not getting used and hence it is removed in this PR.

Fixes #712

[k8s-ci-robot]

Hi @prafull01. Thanks for your PR.

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[DirectXMan12]

FYI: I edited the title to conform to our title standards (the type indicator must be the first thing in the title), removed the comments from the PR description, and added a Fixes #xyz line to the PR. In the future, please try to follow the PR guidelines in the PR template :-)

[DirectXMan12]

/lgtm
/approve

non-breaking due to being in the internal package, and being unused

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: DirectXMan12, prafull01

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