refactor(l1,l2): remove unused dependency and import

[MegaRedHand]

Motivation

Main was broken due to L2 linting job. Also, and unused dependency was introduced in the latest commit.

Description

This PR removes the unused import causing the CI error, along with the unused ethrex-trie dependency on the ethrex package.

[Copilot]

Pull Request Overview

Refactor to fix linting errors and remove an unused dependency.

• Remove unused rocksdb::DBCommon import in tests to resolve CI linting failure.
• Drop unused ethrex-trie dependency from the ethrex binary crate.

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
crates/storage/trie_db/rocksdb.rs	Removes unused DBCommon import from rocksdb test module.
cmd/ethrex/Cargo.toml	Removes unused ethrex-trie workspace dependency from the ethrex binary crate.

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