PR Summary

Two csproj files still have path references which are not existent anymore in the current file structure. This PR removes those non-existent path references.
The corresponding files have been removed in the PRs:

• removed RunspaceConfiguration support #4942
• Remove PSMI code #5075
• Clean Up Full CLR Code From Web Cmdlets #5376

PR Context

A clean-up to csproj files to keep them up-to-date.

PR Checklist

• PR has a meaningful title
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• Summarized changes
• Change is not breaking
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
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• User-facing changes
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  • Documentation needed
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  • N/A or can only be tested interactively
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