Resolve compiler warning by removing unused line

[Levi0804]

Description

This PR removes an unused line from the unit test test_events in the account module (aptos-move/framework/aptos-framework/sources/account.move):
let eventhandle = &borrow_global<Account>(addr).coin_register_events;

How to generate the warning?

To generate the warning, create a module and bring the account module into scope. For example:

module 0x9000::test {
    use aptos_framework::account;
}

now use aptos move test, the following warning could be seen:

warning[W09003]: unused assignment
     ┌─ /home/levi0804/.move/https___github_com_aptos-labs_aptos-core_git_mainnet/aptos-move/framework/aptos-framework/sources/account.move:1538:13
     │
1538 │         let eventhandle = &borrow_global<Account>(addr).coin_register_events;
     │             ^^^^^^^^^^^ Unused assignment or binding for local 'eventhandle'. Consider removing, replacing with '_', or prefixing with '_' (e.g., '_eventhandle')

How Has This Been Tested?

I removed the mentioned line locally from the unit test in the account module and ran aptos move test --skip-fetch-latest-git-deps on a module similar to the one above (0x9000::test), which resolved the compiler warning

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

[trunk-io]

⏱️ 17m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	12m	🟩
rust-cargo-deny	2m	🟩
check-dynamic-deps	1m	🟩
semgrep/ci	29s	🟩
general-lints	25s	🟩
file_change_determinator	12s	🟩
permission-check	6s	🟥 🟩
permission-check	5s	🟥 🟩

_{settings ⋅ feedback ⋅ docs ⋅ learn more about trunk.io}

[gregnazario]

Doing the real work that kept bothering me :)

[Levi0804]

Doing the real work that kept bothering me :)

Happy to contribute! :D

[github-actions]

✅ Forge suite realistic_env_max_load success on d215c123aade44a9996ead4168ee0bf15ee5e951

two traffics test: inner traffic : committed: 13894.55 txn/s, latency: 2862.76 ms, (p50: 2700 ms, p70: 2700, p90: 3000 ms, p99: 3900 ms), latency samples: 5283060
two traffics test : committed: 100.06 txn/s, latency: 2199.36 ms, (p50: 2000 ms, p70: 2200, p90: 2500 ms, p99: 10400 ms), latency samples: 1780
Latency breakdown for phase 0: ["MempoolToBlockCreation: max: 2.045, avg: 1.194", "ConsensusProposalToOrdered: max: 0.321, avg: 0.297", "ConsensusOrderedToCommit: max: 0.386, avg: 0.369", "ConsensusProposalToCommit: max: 0.681, avg: 0.666"]
Max non-epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 0.76s no progress at version 1923226 (avg 0.20s) [limit 15].
Max epoch-change gap was: 0 rounds at version 0 (avg 0.00) [limit 4], 15.47s no progress at version 1923222 (avg 14.95s) [limit 16].
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite compat success on 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951

Compatibility test results for 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951 (PR)
1. Check liveness of validators at old version: 010570d3b7aa20889fb5ad0e5b23800aa33f5634
compatibility::simple-validator-upgrade::liveness-check : committed: 14839.28 txn/s, latency: 2257.63 ms, (p50: 2100 ms, p70: 2100, p90: 2200 ms, p99: 7500 ms), latency samples: 556640
2. Upgrading first Validator to new version: d215c123aade44a9996ead4168ee0bf15ee5e951
compatibility::simple-validator-upgrade::single-validator-upgrading : committed: 6810.42 txn/s, latency: 4166.41 ms, (p50: 4700 ms, p70: 4900, p90: 5400 ms, p99: 5700 ms), latency samples: 125880
compatibility::simple-validator-upgrade::single-validator-upgrade : committed: 6740.55 txn/s, latency: 4793.91 ms, (p50: 5100 ms, p70: 5200, p90: 6600 ms, p99: 7000 ms), latency samples: 226540
3. Upgrading rest of first batch to new version: d215c123aade44a9996ead4168ee0bf15ee5e951
compatibility::simple-validator-upgrade::half-validator-upgrading : committed: 7047.51 txn/s, latency: 3972.10 ms, (p50: 4500 ms, p70: 4700, p90: 4900 ms, p99: 5100 ms), latency samples: 129780
compatibility::simple-validator-upgrade::half-validator-upgrade : committed: 7017.45 txn/s, latency: 4544.92 ms, (p50: 4800 ms, p70: 5000, p90: 6300 ms, p99: 6500 ms), latency samples: 236840
4. upgrading second batch to new version: d215c123aade44a9996ead4168ee0bf15ee5e951
compatibility::simple-validator-upgrade::rest-validator-upgrading : committed: 11830.86 txn/s, latency: 2365.78 ms, (p50: 2600 ms, p70: 2700, p90: 2800 ms, p99: 3000 ms), latency samples: 204820
compatibility::simple-validator-upgrade::rest-validator-upgrade : committed: 10307.59 txn/s, latency: 3035.44 ms, (p50: 2700 ms, p70: 2800, p90: 6100 ms, p99: 7100 ms), latency samples: 334480
5. check swarm health
Compatibility test for 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951 passed
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking

[github-actions]

✅ Forge suite framework_upgrade success on 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951

Compatibility test results for 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951 (PR)
Upgrade the nodes to version: d215c123aade44a9996ead4168ee0bf15ee5e951
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1392.42 txn/s, submitted: 1393.77 txn/s, failed submission: 1.35 txn/s, expired: 1.35 txn/s, latency: 2317.12 ms, (p50: 1800 ms, p70: 2400, p90: 4200 ms, p99: 5700 ms), latency samples: 123600
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1457.34 txn/s, submitted: 1460.46 txn/s, failed submission: 3.12 txn/s, expired: 3.12 txn/s, latency: 2037.76 ms, (p50: 1800 ms, p70: 2100, p90: 3000 ms, p99: 4600 ms), latency samples: 130980
5. check swarm health
Compatibility test for 010570d3b7aa20889fb5ad0e5b23800aa33f5634 ==> d215c123aade44a9996ead4168ee0bf15ee5e951 passed
Upgrade the remaining nodes to version: d215c123aade44a9996ead4168ee0bf15ee5e951
framework_upgrade::framework-upgrade::full-framework-upgrade : committed: 1196.28 txn/s, submitted: 1199.38 txn/s, failed submission: 3.09 txn/s, expired: 3.09 txn/s, latency: 2533.43 ms, (p50: 2400 ms, p70: 2700, p90: 3600 ms, p99: 5300 ms), latency samples: 108240
Test Ok

• Grafana dashboard
• Humio Logs
• Axiom Logs
• Validator CPU Profile
• Fullnode CPU Profile
• Test runner output
• Test run is land-blocking