Based on `main`. **Pure deletion — no behavior change**, because the
deleted code cannot execute.
## Found while trying to convert it
This started as a U11 slice to make the scheduler's dispatch path
resolve its column by trait. Per the lesson from the dependency-blocked
feature I checked reachability *before* converting:
```ts
function shouldRunWorkflowColumnScheduler(_settings: Settings): boolean {
return true; // parameter UNUSED, body a literal
}
...
if (shouldRunWorkflowColumnScheduler(settings)) {
await this.runHoldReleaseSweepPass(tasks, settings);
...
return; // UNCONDITIONAL, at the block's own depth
}
<929 lines of legacy pull-from-todo dispatcher> // unreachable
```
The guard takes an **unused** parameter and returns a **literal**, so
the branch is statically always taken, and it ends in an **unconditional
`return`**. Everything after it in `schedule()` is unreachable.
`tsc` doesn't flag it because the condition is a function call rather
than a literal — which is exactly why 929 lines survived the U6 cutover.
The replacement was added *in front of* the old dispatcher rather than
*instead of* it, and the in-file comment says so outright:
> the hold/release sweep owns todo→in-progress pickup, so do not fall
through into the legacy pull-from-todo dispatcher after the sweep runs
## Why this matters beyond line count
**4 of the 15 `"todo"` literals in `scheduler.ts` live in this dead
region.** Converting them would have been pure waste — and worse, it
would have reported progress against the U11 critical path while
changing nothing. 11 live sites remain and are the real work.
## Corroborating evidence
Six imports became unused and are removed with it:
`resolveDependencyOrder`, `sortTasksByPriorityFanoutThenAgeAndId`,
`buildUnblockWeightMap`, `TransitionRejectionError`,
`isUnplannedSeedPrompt`, `DEFAULT_WORKFLOW_POOL_ID`.
That the dead region was their **only** consumer in this file is itself
evidence: a live dispatcher would still need dependency ordering and
priority sorting.
## Why no new test
The proof here is **static, not behavioral** — an unconditional `return`
before the code. A test cannot demonstrate absence of execution more
strongly than the control flow already does, and one that passed both
before and after would be theatre.
The evidence that nothing depended on it: **all 100 scheduler tests and
the full merge gate pass unchanged.**
## Measured
`scheduler.ts` **3,726 → 2,797 = −929 lines.**
Unlike every consolidation in this program, this is a **genuine net
reduction** — nothing was moved elsewhere.
## Verification
100 scheduler tests green across all 7 scheduler suites; merge gate
green (307 + 10 + 71); tsc clean; lint clean.
No changeset: `@fusion/engine` is private.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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