diff --git a/ch-5/6-all/robot.py b/ch-5/6-all/robot.py
deleted file mode 100755
index f38484a..0000000
--- a/ch-5/6-all/robot.py
+++ /dev/null
@@ -1,19 +0,0 @@
-# Write your code here :-)
-import board
-import digitalio
-
-motor_A1 = digitalio.DigitalInOut(board.GP17)
-motor_A2 = digitalio.DigitalInOut(board.GP16)
-motor_B1 = digitalio.DigitalInOut(board.GP18)
-motor_B2 = digitalio.DigitalInOut(board.GP19)
-
-motor_A1.direction = digitalio.Direction.OUTPUT
-motor_A2.direction = digitalio.Direction.OUTPUT
-motor_B1.direction = digitalio.Direction.OUTPUT
-motor_B2.direction = digitalio.Direction.OUTPUT
-
-def stop():
-    motor_A1.value = False
-    motor_A2.value = False
-    motor_B1.value = False
-    motor_B2.value = False