drop non-existent arg in callback

Dependencies

• [2] CYGNFOA5 Merge text0
• [3] 36Z442IV back to commit 8123959e52f without code editing
• [4] LRDM35CE app running again
• [5] TXDMRA5J bugfix: alt-tab shouldn't emit keypress events
• [6] C3GUE45I Merge text.love
• [7] JOPVPUSA editing source code from within the app
• [*] OTIBCAUJ love2d scaffold

Change contents

• replacement in main.lua at line 174
  [3.7595]→[2.1330:1399](∅→∅)
  − if on.key_release then on.key_release(key, scancode, isrepeat) end
  [3.7595]

  [3.190712]
  + if on.key_release then on.key_release(key, scancode) end