chore: remove unused DW-REQ-011.11.7 (never merged to main)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: nhorton

specs/deepwork/DW-REQ-011-deepschema.md

@@ -86,4 +86,3 @@ The DeepSchema system provides rich, file-level schemas with automatic validatio
 4. The order of inlined reference files MUST be deterministic across runs for a given schema.
 5. When a referenced file cannot be located on disk, the bridge MUST skip it and surface an error through the `errors` return of `generate_review_rules`. A missing reference file MUST NOT prevent the rule from being generated.
 6. Reference entries whose `path` begins with `http://` or `https://` MUST be skipped without producing an error, since they are informational pointers rather than local files.
-7. (OPTIONAL — REQUIREMENT REMOVED, superseded by REVIEW-REQ-004.3.5.)