fix clippy
fix clippy


Former-commit-id: 952dacd8c33e5e9f7494b0daee532414fd3d5014
alekseysidorov/exonum,exonum/exonum,exonum/exonum,alekseysidorov/exonum,alekseysidorov/exonum,exonum/exonum,alekseysidorov/exonum,exonum/exonum