refactor: remove dead code (#3337)

fluxer_messages/Cargo.toml

@@ -13,15 +13,12 @@ chrono = { version = "0.4.45", default-features = false, features = ["serde"] }
 fluxer-svc = { path = "../fluxer_svc" }
 fluxer_markdown_parser = { path = "../packages/markdown_parser/rust" }
 futures = "0.3.34"
-hmac = "0.13.0"
 linkify = "0.11.0"
 mime_guess = "2.0.5"
-moka = { version = "0.12.16", features = ["future", "sync"] }
 rmp-serde = "1.3"
 scylla = { version = "1.9.0", features = ["chrono-04"], optional = true }
 serde = { version = "1.0.229", features = ["derive"] }
 serde_json = "1.0.151"
-sha2 = "0.11.0"
 tokio = { version = "1.53.1", features = ["macros", "rt-multi-thread", "signal"] }
 tracing = "0.1.44"
 url = "2.5.8"