Remove top-level v1/v2 after moving to legacy/

v1/v1_profilegen/splits/split_config_v1_profilegen_llm.json

@@ -1,29 +0,0 @@
-{
-  "version": "v1",
-  "track": "profilegen",
-  "profile_generator": "gpt-5.4",
-  "seed": 20260318,
-  "experiment_wallets_file": "wallet_ids_diverse_nonoverlap_2000_seed20260318.txt",
-  "experiment_wallets": 2000,
-  "split_ratios": {
-    "train": 0.7,
-    "validation": 0.15
-  },
-  "workers": 10,
-  "flush_every_wallets": 200,
-  "counts": {
-    "train": {
-      "samples": 98094,
-      "wallets": 2000
-    },
-    "validation": {
-      "samples": 21147,
-      "wallets": 2000
-    },
-    "test": {
-      "samples": 22204,
-      "wallets": 2000
-    }
-  },
-  "test_source": "outputs/predictions_profilegen_test_gpt-5_4.jsonl"
-}