Remove Darren Murph podcast broken link in handbook

Why is this change being made?

This MR fixes a broken link in GitLab Strategy and Operations (Workplace) Team Handbook page.

Broken link

https://customercentric.unbabel.com/podcast/darren-murph-gitlab

Context

Proposed solution

According to my research, in every podcasting service (Spotify, Apple Podcast, Listen notes, etc.), when you find and play this episode, an error arises because the source doesn't exist anymore.

Apparently unbabel.com is no longer a podcast service, now, they offer other services.

From archive.org Wayback Machine, the last valid capture was on April, 2021.

So, as we can't locate a valid link where the podcast could be listened to, the proposed solution of this MR is to delete the entry from the resources.

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added, and the content is SAFE
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies
  • The when to get approval handbook section explains the workflow in more detail
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

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