Rename the 26 Collector C trials to carry a collectorC infix (2/2: remove old paths)

Removes the pre-rename paths, now that every file has been verified present at its new path with an identical LFS hash.

Also drops two stray .nfs conversion-log files that had been published by accident; they are not carried over to the new paths.

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20260110/Jelly_1_lerobot/meta/episodes.jsonl

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-{"episode_index": 1, "tasks": ["pick up the jelly"], "length": 92}
-{"episode_index": 2, "tasks": ["pick up the jelly"], "length": 103}
-{"episode_index": 3, "tasks": ["pick up the jelly"], "length": 87}
-{"episode_index": 4, "tasks": ["pick up the jelly"], "length": 69}

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20260110/Jelly_1_lerobot/meta/info.json

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-{
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-    "total_frames": 450,
-    "total_tasks": 1,
-    "total_videos": 1,
-    "total_chunks": 1,
-    "chunks_size": 1000,
-    "fps": 10.000007653067081,
-    "data_path": "data/chunk-{episode_chunk:03d}/episode_{episode_index:06d}.parquet",
-    "video_path": "videos/chunk-{episode_chunk:03d}/{video_key}/episode_{episode_index:06d}.mp4",
-    "features": {
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20260110/Jelly_1_lerobot/meta/modality.json

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-{
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-      "start": 0,
-      "end": 3,
-      "description": "Right-hand thumb tip position (x, y, z) in Aria world frame, from MPS hand tracking landmark 4. NaN when the hand is not detected."
-    },
-    "index_tip_position": {
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-      "description": "Right-hand index fingertip position (x, y, z) in Aria world frame, from MPS hand tracking landmark 8. NaN when the hand is not detected."
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-      "description": "Combined-force magnitude of tactile module 1, mounted on the thumb tip in this session, in raw signed-16-bit sensor counts (no force calibration was applied — not newtons). Mirrors action.tactile.left.force_total."
-    },
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20260110/Jelly_1_lerobot/meta/stats.json

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20260110/Jelly_1_lerobot/meta/tasks.jsonl

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-{
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20260110/Jelly_2_lerobot/meta/modality.json

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-{
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20260110/Jelly_2_lerobot/meta/tasks.jsonl

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