Remove duplicates: container provider sample

[matt9ucci]

PR Summary

Remove code blocks and retain links.
I did not remove several code blocks that were different from links because I did not know why they were.

PR Context

Conceptual content

• Scripting and development
  • Language Spec
  • Legacy SDK

PR Checklist

• I have read the contributors guide and followed the style and process guidelines
• PR has a meaningful title
• PR is targeted at the staging branch
• This PR is ready to merge and is not Work in Progress

[opbld30]

Docs Build status updates of commit cd287e1:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/developer/prog-guide/creating-a-windows-powershell-container-provider.md	✅Succeeded	View (>=powershell-5.1)

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

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