fix: remove marked node field#273

microbit-matt-hillsdon wants to merge 2 commits intoRaspberryPiFoundation:mainRaspberryPiFoundation/blockly-keyboard-experimentation:mainfrom

microbit-matt-hillsdon:simplify-marked-nodemicrobit-matt-hillsdon/blockly-keyboard-experimentation:simplify-marked-nodeCopy head branch name to clipboard