delete: Remove peer_channel_encryptor.rs

Functionality moved to:
- peers/handshake/mod.rs
- peers/handshake/states.rs
- peers/conduit.rs

Fuzz testing rewritten here:
- fuzz/src/peer_crypt.rs

Author: julianknutsen

lightning/src/ln/mod.rs

@@ -26,11 +26,6 @@ pub mod chan_utils;
 pub mod features;
 pub(crate) mod onchaintx;
 
-#[cfg(feature = "fuzztarget")]
-pub mod peer_channel_encryptor;
-#[cfg(not(feature = "fuzztarget"))]
-pub(crate) mod peer_channel_encryptor;
-
 mod channel;
 mod onion_utils;
 mod wire;
@@ -51,4 +46,3 @@ mod chanmon_update_fail_tests;
 #[cfg(test)]
 mod reorg_tests;
 
-pub use self::peer_channel_encryptor::LN_MAX_MSG_LEN;