Fix a few lints introducedin Rust 1.77 #867

Job	Run time
documentation	2m 38s
features (--no-default-features)	46s
features (--no-default-features --features serialization)	49s
test (ubuntu-latest, stable)	40s
linting (stable)	1m 0s
features (--no-default-features --features serial)	1m 11s
test (ubuntu-latest, beta)	39s
linting (beta)	52s
features (--no-default-features --features tls)	1m 2s
bindings-linux (x86_64-unknown-linux-gnu)	2m 35s
bindings-linux (i686-unknown-linux-gnu)	2m 35s
test (windows-latest, stable)	1m 49s
bindings-linux (x86_64-unknown-linux-musl)	2m 39s
bindings-linux (arm-unknown-linux-gnueabihf)	2m 48s
bindings-macos (x86_64-apple-darwin)	2m 13s
bindings-windows (x86_64-pc-windows-msvc, true)	2m 56s
test (windows-latest, beta)	1m 51s
bindings-windows (i686-pc-windows-msvc, false)	2m 34s
bindings-linux (arm-unknown-linux-musleabihf)	2m 49s
bindings-linux (aarch64-unknown-linux-gnu)	2m 38s
conformance	3m 10s
bindings-linux (aarch64-unknown-linux-musl)	2m 44s
guide	1m 3s
bindings-linux (armv7-unknown-linux-gnueabihf)	2m 39s
bindings-linux (arm-unknown-linux-gnueabi)	2m 38s
packaging	1s
release	1s
	49m 20s

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