chore: remove unused log dep

crates/cashu/Cargo.toml

@@ -28,8 +28,6 @@ serde = { workspace = true }
 serde_json = { workspace = true }
 url = { workspace = true }
 regex = "1.8.4"
-log = "0.4.19"
-
 
 [dev-dependencies]
 tokio = {version = "1.27.0", features = ["rt", "macros"] }