Delete row ('1407', '20731') from daily_volatility

ticker_id 1407
day 20731
implied_open 0.7222901079206332
implied_high 0.8588108755715662
implied_low 0.7016532476943295
implied_close 0.7222901079206332
historical_open 2.11607189858946
historical_high 2.11607189858946
historical_low 2.11607189858946
historical_close 2.11607189858946
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