Fix python3.14 deprecation. (#2759)

Author: janiversen

pymodbus/simulator/simdata.py

@@ -1,7 +1,6 @@
 """Simulator data model classes."""
 from __future__ import annotations
 
-import asyncio
 from collections.abc import Awaitable, Callable
 from dataclasses import dataclass
 from enum import Enum
@@ -194,7 +193,7 @@ def __post_init__(self):
             raise TypeError("0 <= address < 65535")
         if not isinstance(self.count, int) or not 0 < self.count <= 65535:
             raise TypeError("0 < count <= 65535")
-        if self.action and not (callable(self.action) or asyncio.iscoroutinefunction(self.action)):
+        if self.action and not callable(self.action):
             raise TypeError("action not Callable or Awaitable (async)")
         if not isinstance(self.datatype, SimDataType):
             raise TypeError("datatype not SimDataType")