[Bitcoin-abc] Fixed CI, removed Cargo.lock duplicates

Summary: During a previous rebase, we accidently landed a duplicated dependency in Cargo.lock which breaks parsing. Removing it fixes the build.

Test Plan: cargo check

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, tobias_ruck

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, tobias_ruck

Differential Revision: https://reviews.bitcoinabc.org/D17312