add copyright. remove unused imports

Author: Jiloc

stackslib/src/net/api/tests/gethealth.rs

@@ -1,3 +1,18 @@
+// Copyright (C) 2013-2020 Blockstack PBC, a public benefit corporation
+// Copyright (C) 2020-2025 Stacks Open Internet Foundation
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 use std::net::{IpAddr, Ipv4Addr, SocketAddr};
 
 use clarity::types::chainstate::StacksBlockId;
@@ -11,9 +26,8 @@ use crate::net::download::nakamoto::{
     NakamotoDownloadStateMachine, NakamotoUnconfirmedTenureDownloader,
 };
 use crate::net::httpcore::{StacksHttp, StacksHttpRequest};
-use crate::net::inv::epoch2x::NodeStatus;
 use crate::net::test::TestEventObserver;
-use crate::net::{NeighborAddress, NeighborKey, ProtocolFamily};
+use crate::net::{NeighborAddress, ProtocolFamily};
 
 #[test]
 fn test_try_parse_request() {