remove reference to private docs

Author: “ramfox”

iroh/src/magicsock/endpoint_map/endpoint_state.rs

@@ -38,8 +38,6 @@ use crate::{
 mod guarded_channel;
 
 /// Number of addresses that are not active that we keep around per endpoint.
-///
-/// See [`EndpointState::prune_ip_paths`].
 pub(super) const MAX_INACTIVE_IP_ADDRESSES: usize = 20;
 
 /// Max duration of how long ago we learned about this source before we are willing