Remove debug keystrokes in symbol 'A'

symbols.py

@@ -45,7 +45,7 @@ symbols = {
             'sound': 'sounds/a.wav',
             'state': 0,
             'output': 'A',
-            'scancodes': '\x02\x04\x02\xff\x02\xfc',
+            'scancodes': '\x02\x04',
             'child': []
         }, {
             'str': 'E',