Remove unnecessary link to reddit

[sdwheeler]

PR Summary

Remove unnecessary link to reddit

• Fixes AB#266458

PR Checklist

• [x] Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• [x] Summary: This PR's summary describes the scope and intent of the change.
• [x] Contributor's Guide: I have read the contributors guide.
• [x] Style: This PR adheres to the style guide.

[learn-build-service-prod[bot]]

Learn Build status updates of commit bffae2f:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/learn/deep-dives/everything-about-arrays.md	:white_check_mark:Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/learn/deep-dives/everything-about-exceptions.md	:white_check_mark:Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/learn/deep-dives/everything-about-pscustomobject.md	:white_check_mark:Succeeded	View (>=powershell-5.1)
reference/docs-conceptual/learn/deep-dives/everything-about-string-substitutions.md	:white_check_mark:Succeeded	View (>=powershell-5.1)

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