Fix aloha real-world datasets (#175)

tests/data/lerobot/umi_cup_in_the_wild/meta_data/info.json

@@ -1,4 +1,3 @@
-{
-    "fps": 10,
-    "video": 1
-}
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+size 33

tests/data/lerobot/umi_cup_in_the_wild/train/dataset_info.json

@@ -1,67 +1,3 @@
-{
-  "citation": "",
-  "description": "",
-  "features": {
-    "observation.image": {
-      "_type": "VideoFrame"
-    },
-    "observation.state": {
-      "feature": {
-        "dtype": "float32",
-        "_type": "Value"
-      },
-      "length": 7,
-      "_type": "Sequence"
-    },
-    "episode_index": {
-      "dtype": "int64",
-      "_type": "Value"
-    },
-    "frame_index": {
-      "dtype": "int64",
-      "_type": "Value"
-    },
-    "timestamp": {
-      "dtype": "float32",
-      "_type": "Value"
-    },
-    "episode_data_index_from": {
-      "dtype": "int64",
-      "_type": "Value"
-    },
-    "episode_data_index_to": {
-      "dtype": "int64",
-      "_type": "Value"
-    },
-    "end_pose": {
-      "feature": {
-        "dtype": "float32",
-        "_type": "Value"
-      },
-      "length": 6,
-      "_type": "Sequence"
-    },
-    "start_pos": {
-      "feature": {
-        "dtype": "float32",
-        "_type": "Value"
-      },
-      "length": 6,
-      "_type": "Sequence"
-    },
-    "gripper_width": {
-      "feature": {
-        "dtype": "float32",
-        "_type": "Value"
-      },
-      "length": 1,
-      "_type": "Sequence"
-    },
-    "index": {
-      "dtype": "int64",
-      "_type": "Value"
-    }
-  },
-  "homepage": "",
-  "license": ""
-}
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+size 1245

tests/data/lerobot/umi_cup_in_the_wild/train/state.json

@@ -1,13 +1,3 @@
-{
-  "_data_files": [
-    {
-      "filename": "data-00000-of-00001.arrow"
-    }
-  ],
-  "_fingerprint": "c8b78ec1bbf7a579",
-  "_format_columns": null,
-  "_format_kwargs": {},
-  "_format_type": null,
-  "_output_all_columns": false,
-  "_split": null
-}
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+size 247