Remove 7.3 content

[sdwheeler]

PR Summary

Remove 7.3 content

• Fixes AB#250369

PR Checklist

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

[learn-build-service-prod]

Learn Build status updates of commit c1e9d19:

✅ Validation status: passed

File	Status	Preview URL	Details
.openpublishing.redirection.psget.json	✅Succeeded
README.md	✅Succeeded
reference/7.3/CimCmdlets/CimCmdlets.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Get-CimAssociatedInstance.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Get-CimClass.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Get-CimInstance.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Get-CimSession.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Invoke-CimMethod.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/New-CimInstance.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/New-CimSession.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/New-CimSessionOption.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Register-CimIndicationEvent.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Remove-CimInstance.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Remove-CimSession.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/CimCmdlets/Set-CimInstance.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Archive/Compress-Archive.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Archive/Expand-Archive.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Archive/Microsoft.PowerShell.Archive.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/.markdownlint.yaml	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/About.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/about_Alias_Provider.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/about_Aliases.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/about_ANSI_Terminals.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/about_Arithmetic_Operators.md	✅Succeeded	n/a (file deleted or renamed)
reference/7.3/Microsoft.PowerShell.Core/About/about_Arrays.md	✅Succeeded	n/a (file deleted or renamed)

This comment lists only the first 25 files in the pull request.
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