Remove unnecessary order_by field in a query

[jlara310]

The start_at_name query has an extra order_by that causes an error.

Removes the following error:

ValueError: The "order by" field path 'state' is not present in the cursor data {'name': 'Springfield'}. All fields sent to order_by() must be present in the fields if passed to one of start_at() / start_after() / end_before() / end_at() to define a cursor.

Description

Fixes #

Note: It's a good idea to open an issue first for discussion.

Checklist

• I have followed Sample Guidelines from AUTHORING_GUIDE.MD
• README is updated to include all relevant information
• Tests pass: nox -s py-3.6 (see Test Environment Setup)
• Lint pass: nox -s lint (see Test Environment Setup)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• Please merge this PR for me once it is approved.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample

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[parthea]

@crwilcox Can we remove the Do Not Merge label?

[crwilcox]

Yep!

[parthea]

Thanks!