HFTTransformerConfig had seven write-only bool flags with zero conditional
readers anywhere in the workspace:
- FFLAG-017: use_market_microstructure, use_order_book_features,
use_trade_flow_features
- FFLAG-016: use_flash_attention, use_sparse_attention, use_cuda_graphs,
enable_profiling
Each was declared + defaulted + asserted in tests, but no code branched on
them. Deleted all 7 fields + Default init + production()/benchmark() setters
+ test assertions. Per feedback_no_feature_flags.md these were aspirational
knobs — the features they nominally gated have no implementation.
3f4fa33b9b