cleanup OpenPython OS

Author: EcmaXp

src/main/resources/assets/openpython/opos/boot/01_basic.py

@@ -1,7 +1,3 @@
-import machine
-
 import event
 
-
-
 event.setup()

src/main/resources/assets/openpython/opos/boot/04_builtin.py

@@ -43,7 +43,7 @@ def input(prompt=None):
         elif ch == '\b':
             if buf:
                 buf.pop()
-                write(ch + "---")
+                write(ch)
             continue
         else:
             write(ch)

src/main/resources/assets/openpython/opos/lib/openos/event.py

@@ -244,6 +244,7 @@ def on_error(e):
 
 def setup():
     global keyboard
+
     def pull_signal(seconds):
         ticks = sys.maxsize if seconds == INF else int(seconds * 20)
         return signal_handler(ticks)

src/main/resources/assets/openpython/opos/lib/openos/robot.py

@@ -81,8 +81,6 @@ def down(self, *args):
             return self.func(DOWN, *args)
 
 
-
-
 class RobotResult:
     def __init__(self, result):
         self.result = result