Remove profiler from spec tests utils

[dapplion]

Motivation

• v8-profiler-next adds a noticeable time to installation which is apparent in blst-ts which triggers 46 runs per commit.
• We have other better ways to profile Lodestar, be Tuyen's perf tests or just taking a profile on demand on a running node
• If one needs to profile a spec test, can do so wrapping the function to test in the consumer side, outside of this util.

Description

Remove profiler code from spec test utils

[codeclimate]

Code Climate has analyzed commit fa3b13c and detected 0 issues on this pull request.

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[lgtm-com]

This pull request introduces 2 alerts when merging fa3b13c into cfd51c3 - view on LGTM.com

new alerts:

• 2 for Unused variable, import, function or class