fix syntax error

Author: winemug

batt_check.py

@@ -118,15 +118,12 @@ def _get_adc_reading(self):
         adc_sum = 0
         for adcnum in self.adcs:
             try:
-                adc_sum += self.readadc(adcnum, self.SPICLK, self.SPIMOSI, self.SPIMISO, self.SPICS)
+                adc_sum += self._readadc(adcnum, self.SPICLK, self.SPIMOSI, self.SPIMISO, self.SPICS)
             except:
                 print("Error reading adc value")
             time.sleep(0.05)
         return float(adc_sum / len(self.adcs))
 
-    def _get_battery_level(self):
-        avg = self._get_moving_average()
-
     def _get_percentage(self, adc_reading):
         # convert analogue reading to volts and %, accounting for vref and setup of resistor bridge
         volts = adc_reading * ( self.vref / 1024 ) * (self.res1 + self.res2) / self.res2