remove unexpected sleep in search query

[towhidzei]

fixes: #98

[sre-ci-robot]

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[sre-ci-robot]

Welcome @towhidzei! It looks like this is your first PR to milvus-io/milvus-sdk-rust 🎉

[mergify]

@towhidzei Thanks for your contribution. Please submit with DCO, see the contributing guide https://github.com/milvus-io/milvus/blob/master/CONTRIBUTING.md#developer-certificate-of-origin-dco.

[xiaofan-luan]

hi @towhidzei , please commit with dco and resubmit.
Thanks for the contribution

[towhidzei]

hi @towhidzei , please commit with dco and resubmit. Thanks for the contribution

Hi @xiaofan-luan
it's done

[xiaofan-luan]

merged