graph: Remove unused ethabi dependency

Author: lutter

Cargo.lock

@@ -27,7 +27,6 @@ chrono = "0.4.43"
 envconfig = { workspace = true }
 Inflector = "0.11.3"
 reqwest = { version = "0.12.23", features = ["json", "stream", "multipart", "gzip", "brotli", "deflate"] }
-ethabi = "17.2"
 hex = "0.4.3"
 http0 = { version = "0", package = "http" }
 http = "1"