Remove redundant WhatAmI tests in HatBaseTrait::init

[fuzzypixelz]

Router and Link-state Peer HatCode::init are only called if the WhatAmI matches the hat:

zenoh/zenoh/src/net/routing/hat/mod.rs

Lines 245 to 257 in 2d5ab7c

	pub(crate) fn new_hat(whatami: WhatAmI, config: &Config) -> Box<dyn HatTrait + Send + Sync> {
	match whatami {
	WhatAmI::Client => Box::new(client::HatCode {}),
	WhatAmI::Peer => {
	if unwrap_or_default!(config.routing().peer().mode()) == *"linkstate" {
	Box::new(linkstate_peer::HatCode {})
	} else {
	Box::new(p2p_peer::HatCode {})
	}
	}
	WhatAmI::Router => Box::new(router::HatCode {}),
	}
	}