Removed deinits from DCMotor and ContinuousServo classes.

Author: =Dale Weber

adafruit_motor/motor.py

@@ -86,7 +86,3 @@ def __enter__(self):
 
     def __exit__(self, exception_type, exception_value, traceback):
         self.throttle = None
-
-    def deinit(self):
-        """Stop using the motor."""
-        self.throttle = None

adafruit_motor/servo.py

@@ -147,7 +147,3 @@ def __enter__(self):
 
     def __exit__(self, exception_type, exception_value, traceback):
         self.throttle = 0
-
-    def deinit(self):
-        """Stop using the servo."""
-        self.throttle = 0