Delete row ('42', '20731') from daily_volatility

ticker_id 42
day 20731
implied_open 0.5714822831899515
implied_high 1.976376229365249
implied_low 0.5714822831899515
implied_close 1.068354379407882
historical_open 0.3508266238471647
historical_high 0.3508266238471647
historical_low 0.3508266238471647
historical_close 0.3508266238471647
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