DEL: Remove unset definitions fields

Author: threecgreen

CHANGELOG.md

@@ -3,6 +3,8 @@
 ## 0.13.0 - TBD
 - Renamed `booklevel` MBP field to `levels` for brevity and consistent naming
 - Changed `flags` field to an unsigned int
+- Removed `open_interest_qty` and `cleared_volume` fields that were always unset from
+  definition schema
 
 ## 0.12.0 - 2023-05-01
 - Added `Live` client for connecting to Databento's live service

databento/common/data.py

@@ -93,7 +93,7 @@ def get_deriv_ba_types(level: int) -> List[Tuple[str, Union[type, str]]]:
     ("price_ratio", np.int64),
     ("inst_attrib_value", np.int32),
     ("underlying_id", np.uint32),
-    ("cleared_volume", np.int32),
+    ("_reserved1", "S4"),
     ("market_depth_implied", np.int32),
     ("market_depth", np.int32),
     ("market_segment_id", np.uint32),
@@ -102,11 +102,11 @@ def get_deriv_ba_types(level: int) -> List[Tuple[str, Union[type, str]]]:
     ("min_lot_size_block", np.int32),
     ("min_lot_size_round_lot", np.int32),
     ("min_trade_vol", np.uint32),
-    ("open_interest_qty", np.int32),
+    ("_reserved2", "S4"),
     ("contract_multiplier", np.int32),
     ("decay_quantity", np.int32),
     ("original_contract_size", np.int32),
-    ("reserved1", "S4"),
+    ("_reserved3", "S4"),
     ("trading_reference_date", np.uint16),
     ("appl_id", np.int16),
     ("maturity_year", np.uint16),
@@ -125,9 +125,9 @@ def get_deriv_ba_types(level: int) -> List[Tuple[str, Union[type, str]]]:
     ("underlying", "S21"),  # 21 byte chararray
     ("strike_price_currency", "S4"),
     ("instrument_class", "S1"),
-    ("reserved2", "S2"),
+    ("_reserved4", "S2"),
     ("strike_price", np.int64),
-    ("reserved3", "S6"),
+    ("_reserved5", "S6"),
     ("match_algorithm", "S1"),  # 1 byte chararray
     ("md_security_trading_status", np.uint8),
     ("main_fraction", np.uint8),