Drop references to uncommitted dev note

kind.py and test_consensus.py pointed at docs/notes/attestation-mental-model.md,
a dev note that was never committed (does not ship, file absent). Remove the
dangling reference; keep the evergreen explanation of the Tenderbake/Oxford+
consensus-op rename.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: Wizard1209

src/pytezos/rpc/kind.py

@@ -4,7 +4,7 @@
     # Legacy consensus ops (pre-Oxford protocols), kept for back-compat
     'endorsement': 0,
     'endorsement_with_slot': 0,
-    # Modern consensus ops (Tenderbake rename, Oxford+): see docs/notes/attestation-mental-model.md
+    # Modern consensus ops (Tenderbake rename, Oxford+)
     'preattestation': 0,
     'attestation': 0,
     'attestation_with_dal': 0,
@@ -30,7 +30,7 @@
     # Legacy consensus ops (pre-Oxford protocols), kept for back-compat
     'endorsement': 0,
     'endorsement_with_slot': 10,
-    # Modern consensus ops (Oxford+ / proto-025): see docs/notes/attestation-mental-model.md
+    # Modern consensus ops (Oxford+ / proto-025)
     'preattestation': 20,
     'attestation': 21,
     'attestation_with_dal': 23,

tests/unit_tests/test_operation/test_consensus.py

@@ -24,7 +24,7 @@ def _aggregate_body(level: int, round_: int) -> bytes:
 
 
 class TestConsensusForging(TestCase):
-    """Round-trip checks against the proto-025 byte layout (docs/notes/attestation-mental-model.md)."""
+    """Round-trip checks against the proto-025 byte layout."""
 
     def test_forge_attestation(self) -> None:
         content = {'kind': 'attestation', 'slot': 1, 'level': 2000000, 'round': 0, 'block_payload_hash': BPH}