Revert "test: add load testing for concurrent contract usage (#378)"

contract/TODO.md

@@ -2,22 +2,13 @@
 
 ## Plan Steps
 - [x] Create branch `add-load-testing-contract-concurrent-usage`
-- [x] Update `Cargo.toml` → add tokio dependency
-- [x] Create `load_tests.rs` → sequential load scenarios (Soroban Env is not Send)
-- [x] Scenarios: game starts, reveals, cash-outs, continues
-- [x] Reserve depletion stress tests
-- [x] Metrics: ≥95% success rate, state consistency assertions
+- [ ] Update `Cargo.toml` → add tokio dependency
+- [ ] Create `load_tests.rs` → 100 concurrent players
+- [ ] Scenarios: game starts, reveals, cash-outs, continues
+- [ ] Reserve depletion stress tests
+- [ ] Metrics: 100% success rate, state consistency
 - [ ] `cargo test --release` verification
 - [ ] Commit: `test: add load testing...`
 - [ ] PR creation
 
-**Note**: Soroban's `Env` is not `Send`, so tests use sequential loops with
-per-player unique seeds rather than OS threads. Metrics (throughput, p95/p99
-latency) are still collected and printed for each scenario.
-
-**Run**:
-```bash
-cargo test --test load_tests --release
-# Heavy 1000-cycle test:
-cargo test --test load_tests --release -- --ignored
-```
+**Next**: Update Cargo.toml + create load_tests.rs