remove unused functions

unwind/db.py

@@ -535,22 +535,6 @@ def sql_fields(tp: Type):
     return (f"{tp._table}.{f.name}" for f in fields(tp))
 
 
-def sql_fieldmap(tp: Type):
-    """-> {alias: (table, field_name)}"""
-    return {f"{tp._table}_{f.name}": (tp._table, f.name) for f in fields(tp)}
-
-
-def mux(*tps: Type):
-    return ", ".join(
-        f"{t}.{n} AS {k}" for tp in tps for k, (t, n) in sql_fieldmap(tp).items()
-    )
-
-
-def demux(tp: Type[ModelType], row) -> ModelType:
-    d = {n: row[k] for k, (_, n) in sql_fieldmap(tp).items()}
-    return fromplain(tp, d, serialized=True)
-
-
 def sql_in(column: str, values: Iterable[T], not_=False) -> tuple[str, dict[str, T]]:
     c = column.replace(".", "___")
     value_map = {f"{c}_{i}": v for i, v in enumerate(values, start=1)}