Remove diagnostic eprintln calls from the H100 hang investigation:
- H100_STEP, H100_LOOP, H100_HANG4 prefixes in fused_training.rs
- adam_readback prefix + ADAM_CTR static counter in gpu_dqn_trainer.rs
- H100_LOOP + FUSED STEP ERROR in training_loop.rs
- Debug cuStreamSynchronize block after PER update in fused_training.rs
Integration tests and smoke tests already match current signatures
(ext_stream: Option<&Arc<CudaStream>> with None). seg_tree_kernel.cu
already deleted in prior commit.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
3e726648bc