chore: update ajj dependency to published 0.7.0

Replace git branch reference with crates.io release.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: prestwich

Cargo.toml

@@ -64,7 +64,7 @@ signet-cold-mdbx = "0.6.5"
 signet-storage-types = "0.6.5"
 
 # ajj
-ajj = { git = "https://github.com/init4tech/ajj.git", branch = "prestwich/into-error-payload" }
+ajj = "0.7.0"
 
 # trevm
 trevm = { version = "0.34.0", features = ["full_env_cfg"] }

crates/rpc/src/eth/helpers.rs

@@ -18,7 +18,6 @@ use alloy::{
 };
 use serde::Deserialize;
 use signet_cold::ColdReceipt;
-use signet_hot::db::HotDbRead;
 use signet_storage_types::ConfirmationMeta;
 use trevm::MIN_TRANSACTION_GAS;