refactor(iroh-net): Remove pub(self) visibility specifier #4043

Job	Run time
Cross compile (i686-unknown-linux-gnu)	2m 22s
Cross compile (armv7-linux-androideabi)	2m 48s
Cross compile (aarch64-linux-android)	2m 41s
Build and test (Windows) (windows-latest, nightly, x86_64-pc-windows-msvc)	10m 21s
Build and test (Windows) (windows-latest, stable, x86_64-pc-windows-msvc)	17m 41s
Build and test (Nix) (ubuntu-latest, nightly)	3m 48s
Build and test (Nix) (ubuntu-latest, stable)	5m 2s
Build and test (Nix) (macOS-arm-latest, nightly)	4m 25s
Build and test (Nix) (macOS-arm-latest, stable)	4m 26s
Checking fmt and docs	2m 22s
cargo deny	38s
clippy_check	3m 51s
Minimal Supported Rust Version	5m 23s
Run network simulations/benchmarks	7m 55s
Build release binaries	0s
	1h 13m 43s

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