rpi_temperature: Don't read min_temp/max_temp directly from config

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

docs/Config_Reference.md

@@ -2069,14 +2069,6 @@ CPU temperature from  Raspberry Pi.
 # parameters.
 #sensor_type:
 #   Must be "rpi_temperature".
-min_temp: -40
-max_temp: 85
-#   The maximum safe range of temperatures (in Celsius) that the
-#   RPi must remain within. This controls a safety feature
-#   implemented in the micro-controller code - should the measured
-#   temperature ever fall outside this range then the micro-controller
-#   will go into a shutdown state. Set this range just wide
-#   enough so that reasonable temperatures do not result in an error.
 ```
 
 ## [heater_generic]

klippy/extras/rpi_temperature.py

@@ -7,7 +7,6 @@
 import logging
 
 RPI_REPORT_TIME = 1.0
-KELVIN_TO_CELSIUS = -273.15
 PROC_TEMP_FILE = "/sys/class/thermal/thermal_zone0/temp"
 
 class RPiTemperature:
@@ -16,13 +15,7 @@ class RPiTemperature:
         self.reactor = self.printer.get_reactor()
         self.name = config.get_name().split()[-1]
 
-        self.temp = 0.0
-        self.file_handle = None
-
-        self.min_temp = config.getfloat('min_temp', -40,
-                                        minval=KELVIN_TO_CELSIUS)
-        self.max_temp = config.getfloat('max_temp', 85,
-                                        above=self.min_temp)
+        self.temp = self.min_temp = self.max_temp = 0.0
 
         self.printer.add_object("rpi_temperature " + self.name, self)
         self.sample_timer = self.reactor.register_timer(
@@ -45,7 +38,8 @@ class RPiTemperature:
 
 
     def setup_minmax(self, min_temp, max_temp):
-        pass
+        self.min_temp = min_temp
+        self.max_temp = max_temp
 
     def setup_callback(self, cb):
         self._callback = cb