chore: remove dead, contradictory EXPECTED_HEX_LENGTHS from DeviceService

src/pygui/serialcomm/device_service.py

@@ -19,14 +19,6 @@ log = logging.getLogger(__name__)
 class DeviceService:
     """High-level wafer device communication."""
 
-    # Expected hex string lengths for known wafer families
-    # P wafer: 393216 hex chars (196608 bytes)
-    # X wafer: 1310720 hex chars (655360 bytes)
-    EXPECTED_HEX_LENGTHS = {
-        "P": 393216,
-        "X": 1310720,
-    }
-
     def __init__(self, settings: LocalSettings) -> None:
         self._settings = settings
         self._cached_ports: list[str] = []
@@ -209,7 +201,3 @@ class DeviceService:
         except Exception as exc:
             log.error("Erase failed on %s: %s", port, exc)
             return False
-
-    def get_expected_hex_length(self, family_code: str) -> int:
-        """Return expected hex string length for a wafer family."""
-        return self._settings.get_wafer_data_size(family_code)