Remove superseded manifest names

manifest/sha256sums.txt

@@ -1,3 +0,0 @@
-9b0405705760b4784e8aa3dc986f911cea9669a1a213820961156ab981a134d0  manifest/three_stage.jsonl
-15112eae8b0039ccb7ffa08ac4b34b47cbf29680e9242a82044ed6482413992b  manifest/two_stage.jsonl
-3af4709b50e8ddf694168605d6c6893ad380867fb12ac1e19ae084382043675f  metadata/release_receipt.json

manifest/three_stage.jsonl

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9b0405705760b4784e8aa3dc986f911cea9669a1a213820961156ab981a134d0
-size 297522843

manifest/two_stage.jsonl

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:15112eae8b0039ccb7ffa08ac4b34b47cbf29680e9242a82044ed6482413992b
-size 445960578

metadata/release_receipt.json

@@ -1,65 +0,0 @@
-{
-  "schema_version": "pixal-open-source-release-receipt-v1",
-  "release_version": "pixal3d-mesh-prompt-20261102",
-  "created_at": "2026-11-02T00:00:00Z",
-  "scope": [
-    "mesh",
-    "prompt"
-  ],
-  "excluded_assets": [
-    "point_cloud",
-    "latent",
-    "safetensors",
-    "training_artifacts"
-  ],
-  "three_stage": {
-    "groups": 119905,
-    "records": 119905,
-    "stages_per_group": 3
-  },
-  "two_stage": {
-    "groups": 119905,
-    "records": 239810,
-    "pairs_per_group": 2
-  },
-  "stage_chain": [
-    "image0_base",
-    "image1_edit1",
-    "image2_edit2"
-  ],
-  "materialization": {
-    "status": "pending",
-    "mesh_files": 359715,
-    "source_validation": "manifest checksums are inherited from the verified source release; full local materialization is pending"
-  },
-  "validation": {
-    "prompt_nonempty": true,
-    "internal_paths_removed": true,
-    "internal_fields_removed": true,
-    "full_glb_hash_validation": "pending",
-    "prompt_sha256_verified": true,
-    "manifest_structure_verified": true
-  },
-  "license": "Apache-2.0",
-  "smoke_validation": {
-    "groups": 1,
-    "mesh_files": 3,
-    "sha256_matches": true,
-    "glb_header_validation": true
-  },
-  "distribution": {
-    "format": "uncompressed_tar_shards",
-    "target_shard_size_bytes": 2147483648,
-    "group_atomicity": "a complete three-stage group stays in one shard",
-    "mesh_member_layout": "meshes/<group_key>/<stage>/<filename>.glb",
-    "status": "planned",
-    "packer": "tools/pack_shards_from_bos.py"
-  },
-  "shard_smoke_validation": {
-    "groups": 1,
-    "mesh_files": 3,
-    "shards": 1,
-    "checksum_matches": true,
-    "tar_member_validation": true
-  }
-}