Control: openai#1394 + TTT without RDClip (standard SDClip)

Remove RDClip to establish baseline for openai#1394 + TTT.
Tests whether the base + TTT matches openai#1413's 1.08279.

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

Author: resouer