remove assert that is incorrect and affecting our tests

[SteveL-MSFT]

PR Summary

Remove an assert that is incorrect.

PR Context

Our tests may not suppress progress so many bars get written such that some are hidden so the assert causes debug builds to crash.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
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• Breaking changes
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  • OR
  • Experimental feature(s) needed
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• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed
• Tooling
  • I have considered the user experience from a tooling perspective and don't believe tooling will be impacted.
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    • Impact on PowerShell Editor Services which is used in the PowerShell extension for VSCode
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      • Issue filed:
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      • Issue filed:
    • Impact on PSScriptAnalyzer (which provides linting & formatting in the editor extensions).
      • Issue filed:
    • Impact on EditorSyntax (which provides syntax highlighting with in VSCode, GitHub, and many other editors).
      • Issue filed:

[ghost]

This pull request has been automatically marked as Review Needed because it has been there has not been any activity for 7 days.
Maintainer, please provide feedback and/or mark it as Waiting on Author

[pull-request-quantifier-deprecated]

This PR has 1 quantified lines of changes. In general, a change size of upto 200 lines is ideal for the best PR experience!

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Quantification details

Label      : Extra Small
Size       : +0 -1
Percentile : 0.4%

Total files changed: 1

Change summary by file extension:
.cs : +0 -1

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[ghost]

🎉v7.3.0-preview.2 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes