Fix remnant broken servo code

Author: ksiegall

XRPLib/servo.py

@@ -36,8 +36,7 @@ def __init__(self, signal_pin:int):
 
         self._servo = PWM(Pin(signal_pin, Pin.OUT))
         # Initialize base frequency for the PWM
-        self._servo.init(freq=50)
-        self._is_init = True
+        self._servo.freq(50)
         self.MICROSEC_PER_DEGREE: int = 10000
         self.LOW_ANGLE_OFFSET: int = 500000
 
@@ -47,14 +46,10 @@ def set_angle(self, degrees: float):
         :param degrees: The angle to set the servo to [0,200]
         :ptype degrees: float
         """
-        if not self._is_init:
-            self._servo.init(freq=50)
-            self._is_init = True
         self._servo.duty_ns(int(degrees * self.MICROSEC_PER_DEGREE + self.LOW_ANGLE_OFFSET))
 
     def free(self):
         """
         Allows the servo to spin freely without holding position
         """
-        self._servo.deinit()
-        self._is_init = False
+        self._servo.duty_ns(0)