This was either added by accident, or in an attempt to stop checking the message list once we hit a winevent hook todo [and accidentally given too wide of a scope]. However, the same commit also uses a global counter to ensure that only one winevent todo is printed, so we don't need to break here anyway.
Fixes: a72bffe768c9fe462010d7e40e20226322fb82c7
-- v2: user32/tests: Do not stop checking the message list when skipping an optional or unsupported message. user32/tests: Do not dump the message sequence when a todo succeeds on Windows.