Remove unnecessary option from sample commands

[leahyums]

'-t' optoin specifies the field terminator, in sample commands it's used without specifying a teminator, which may lead to confusion. Since the default field terminator is sufficient for the context thus obmit the option.

Usage: [-t field_term]

[prmerger-automator]

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

[prmerger-automator]

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

[learn-build-service-prod]

Learn Build status updates of commit 55aa847:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/tools/bcp-utility.md	✅Succeeded

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[ShannonLeavitt]

@markingmyname

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

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

[rwestMSFT]

@leahyums We're looking into this. Thanks for your contribution.

[dlevy-msft]

#sign-off

[prmerger-automator]

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

[markingmyname]

#sign-off

[prmerger-automator]

PR 9720 has been merged from leahyums:patch-2 to MicrosoftDocs:live by Court72.

@leahyums, @markingmyname, @dlevy-msft