error in coonfig wtap for dely variabale

removed min vauel won't process in config wrapper

extras/AFC_prep.py

@@ -19,7 +19,7 @@ def __init__(self, config):
         self.gcode = self.printer.lookup_object('gcode')
         self.gcode.register_command('PREP', self.PREP, desc=None)
         self.enable = config.getboolean("enable", False)
-        self.delay = config.get('delay_time', .1, minval=0)
+        self.delay = config.get('delay_time', .1)
 
         # Flag to set once resume rename as occured for the first time
         self.rename_occured = False