[zerocopy] Fix Clippy lints
[zerocopy] Fix Clippy lints

Fixed: 95083
Change-Id: I8d3cdeb588e0fde9568af3f4d7026f6753a07c0f
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/656862
Fuchsia-Auto-Submit: Joshua Liebow-Feeser <234d196e9838c6e234061de31cd689c2a331d758@google.com>
Reviewed-by: Miguel Young de la Sota <71b8e7f4945fd97b98544cf897992af89646547a@google.com>
Reviewed-by: Tyler Mandry <23c76bee785596f2629881c8641bdc9aa64e7f7f@google.com>
Commit-Queue: Auto-Submit <14637eda5603879df170705285bf30f5996692f0@fuchsia-infra.iam.gserviceaccount.com>

google/zerocopy,google/zerocopy