Fix a few lints introducedin Rust 1.77 #863

Job	Run time
linting (stable)	54s
linting (beta)	53s
documentation	3m 8s
features (--no-default-features)	51s
test (ubuntu-latest, stable)	39s
features (--no-default-features --features serialization)	53s
test (ubuntu-latest, beta)	43s
features (--no-default-features --features serial)	1m 7s
test (windows-latest, stable)	2m 49s
features (--no-default-features --features tls)	1m 4s
test (windows-latest, beta)	3m 1s
bindings-linux (x86_64-unknown-linux-gnu)	2m 37s
bindings-macos (x86_64-apple-darwin)	2m 6s
bindings-linux (i686-unknown-linux-gnu)	2m 38s
bindings-linux (x86_64-unknown-linux-musl)	2m 51s
bindings-linux (arm-unknown-linux-gnueabihf)	2m 43s
bindings-windows (x86_64-pc-windows-msvc, true)	6m 52s
bom	1m 24s
bindings-linux (arm-unknown-linux-musleabihf)	2m 57s
bindings-windows (i686-pc-windows-msvc, false)	2m 24s
bindings-linux (aarch64-unknown-linux-gnu)	2m 40s
bindings-linux (aarch64-unknown-linux-musl)	2m 44s
bindings-linux (armv7-unknown-linux-gnueabihf)	2m 41s
conformance	9m 8s
guide	1m 11s
bindings-linux (arm-unknown-linux-gnueabi)	2m 51s
packaging	2m 0s
release	0s
	1h 5m 49s

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