Remove msg about longer sync with remote eth1 nodes (#2453)

## Issue Addressed

- Resolves #2452

## Proposed Changes

I've seen a few people confused by this and I don't think the message is really worth it.

## Additional Info

NA

Author: paulhauner

beacon_node/client/src/notifier.rs

@@ -228,7 +228,6 @@ fn eth1_logging<T: BeaconChainTypes>(beacon_chain: &BeaconChain<T>, log: &Logger
                     warn!(
                         log,
                         "Syncing eth1 block cache";
-                        "msg" => "sync can take longer when using remote eth1 nodes",
                         "est_blocks_remaining" => distance,
                     );
                 }

book/src/faq.md

@@ -161,7 +161,7 @@ See [here.](./installation-source.md#troubleshooting)
 ### What is "Syncing eth1 block cache"
 
 ```
-Nov 30 21:04:28.268 WARN Syncing eth1 block cache   est_blocks_remaining: initializing deposits, msg: sync can take longer when using remote eth1 nodes, service: slot_notifier
+Nov 30 21:04:28.268 WARN Syncing eth1 block cache   est_blocks_remaining: initializing deposits, service: slot_notifier
 ```
 
 This log indicates that your beacon node is downloading blocks and deposits