Clippy clean (#536)

* Change into_iter to iter

* Fix clippy 'easy' warnings

* Clippy eth2/utils

* Add struct NetworkInfo

* Clippy for types, utils, and beacon_node/store/src/iters.rs

* Cargo fmt

* Change foo to my_foo

* Remove complex signature

* suppress clippy warning for unit_value in benches

* Use enumerate instead of iterating over range

* Allow trivially_copy_pass_by_ref in serde_utils

beacon_node/rpc/src/beacon_block.rs

@@ -121,7 +121,7 @@ impl<T: BeaconChainTypes> BeaconBlockService for BeaconBlockServiceInstance<T> {
                             self.network_chan
                                 .try_send(NetworkMessage::Publish {
                                     topics: vec![topic],
-                                    message: message,
+                                    message,
                                 })
                                 .unwrap_or_else(|e| {
                                     error!(