Remove text references to wrench icon

What does this MR do?

We're no longer using the {admin} "Wrench icon" in our documentation. This MR removes the remaining instances where it's found.

Discovered via !50999 (comment 480522491)

Related issues

Author's checklist (required)

• Follow the Documentation Guidelines and Style Guide.
• If you have Developer permissions or higher:
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For suggestions that you are confident don't need to be reviewed, change them locally and push a commit directly to save others from unneeded reviews. For example:

• Clear typos, like this is a typpo.
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