Remove invalid command in python-webapp.md

[xS-Sx]

Hey, MicrosoftDocs contributors.

I believe one command in this page is invalid and create this commit to remove it. Please kindly accept the change if it is the case. Otherwise I would like to know what the suggested removing command do.

Thanks!

[prmerger-automator[bot]]

@xS-Sx : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[Court72]

@cebundy

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[juliakm]

#sign-off

Thanks for the update! That looks like an invalid command to me too.

[prmerger-automator[bot]]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @cebundy