Remove some unnecessary dependencies

walkeeper/Cargo.toml

@@ -7,14 +7,10 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-chrono = "0.4.19"
-crossbeam-channel = "0.5.0"
-rand = "0.8.3"
 regex = "1.4.5"
 bytes = "1.0.1"
 byteorder = "1.4.3"
 fs2 = "0.4.3"
-futures = "0.3.13"
 lazy_static = "1.4.0"
 slog-stdlog = "4.1.0"
 slog-async = "2.6.0"
@@ -23,10 +19,7 @@ slog-term = "2.8.0"
 slog = "2.7.0"
 log = "0.4.14"
 clap = "2.33.0"
-termion = "1.5.6"
-tui = "0.14.0"
 daemonize = "0.4.1"
-rust-s3 = { git = "https://github.com/hlinnaka/rust-s3", rev="7f15a24ec7daa0a5d9516da706212745f9042818", features = ["no-verify-ssl"] }
 tokio = { version = "1.3.0", features = ["full"] }
 tokio-stream = { version = "0.1.4" }
 tokio-postgres = { git = "https://github.com/zenithdb/rust-postgres.git", rev="a0d067b66447951d1276a53fb09886539c3fa094" }

walkeeper/src/wal_service.rs

@@ -3,8 +3,6 @@
 //   receive WAL from wal_proposer and send it to WAL receivers
 //
 
-extern crate fs2;
-
 use byteorder::{BigEndian, ByteOrder};
 use bytes::{Buf, BufMut, Bytes, BytesMut};
 use fs2::FileExt;