Remove superfluous serde dependecy

Author: tnull

Cargo.toml

@@ -64,9 +64,8 @@ bitcoin = "0.29.2"
 bip39 = "2.0.0"
 
 rand = "0.8.5"
-chrono = { version = "0.4", default-features = false, features = ["serde", "clock"] }
+chrono = { version = "0.4", default-features = false, features = ["clock"] }
 futures = "0.3"
-serde_json = { version = "1.0" }
 tokio = { version = "1", default-features = false, features = [ "rt-multi-thread", "time", "sync" ] }
 esplora-client = { version = "0.4", default-features = false }
 libc = "0.2"