Remove dead code in the transport layer

CHANGELOG.md

@@ -15,6 +15,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `perso generate-key --create-key-object` - the same dev/eval fallback
   `import-key` already had.
 
+### Removed
+
+- `transport.pcsc.list_reader_names()`. Nothing called it; `reader_states()`
+  returns the same names along with card presence and ATR.
+
 ## [1.0.3] - 2026-08-31
 
 ### Changed

src/cryptnox_id_cli/transport/errors.py

@@ -156,7 +156,7 @@ def describe_sw(sw1: int, sw2: int) -> SWInfo:
     # Family fallbacks.
     if sw1 == 0x63:
         return SWInfo(sw, "WARNING", "Operation completed with warning / counter changed.")
-    if sw1 in (0x62, 0x63):
+    if sw1 == 0x62:
         return SWInfo(sw, "WARNING", f"Warning (SW={sw:04X}).")
     if sw1 in (0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F):
         return SWInfo(sw, "ERROR", f"Card returned error SW={sw:04X}.")

src/cryptnox_id_cli/transport/pcsc.py

@@ -95,17 +95,6 @@ def reader_states() -> list[ReaderInfo]:
         SCardReleaseContext(hcontext)
 
 
-def list_reader_names() -> list[str]:
-    try:
-        from smartcard.System import readers as _readers
-    except ImportError as exc:  # pragma: no cover
-        raise TransportError(f"pyscard unavailable: {exc}") from exc
-    try:
-        return [str(r) for r in _readers()]
-    except Exception as exc:  # pragma: no cover - defensive
-        raise TransportError(f"Cannot list readers: {exc}") from exc
-
-
 def _listing(infos: list[ReaderInfo]) -> str:
     return ", ".join(f"[{r.index}] {r.name}" for r in infos)