Revert "Suppress a buggy Clippy lint"
Revert "Suppress a buggy Clippy lint"

This reverts commit 8f7efc98fffcabe1aba542ed59e60d3bdeca4a0b.
The Clippy bug has been fixed as of clippy 0.1.55 (74ef0c3e 2021-07-16)

asomers/mockall,asomers/mockall