Remove Nonexistent "deletedDateTime" fileStorageContainer property from examples

[lilealdai]

"deletedDateTime" is not a property of fileStorageContainer and thus should be removed from the fileStorageContainer API examples.

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[learn-build-service-prod]

Learn Build status updates of commit 0657d46:

✅ Validation status: passed

File	Status	Preview URL	Details
api-reference/beta/api/filestorage-get-deletedcontainers.md	✅Succeeded
api-reference/beta/api/filestorage-list-deletedcontainers.md	✅Succeeded
api-reference/beta/api/filestoragecontainer-restore.md	✅Succeeded
api-reference/v1.0/api/filestorage-list-deletedcontainers.md	✅Succeeded
api-reference/v1.0/api/filestoragecontainer-restore.md	✅Succeeded

For more details, please refer to the build report.