Delete row ('1512', '20679') from daily_volatility

ticker_id 1512
day 20679
implied_open 0.6381552162287792
implied_high 0.6429175685886955
implied_low 0.5905316926296166
implied_close 0.5937065942028942
historical_open 1.119152804580322
historical_high 1.119152804580322
historical_low 1.119152804580322
historical_close 1.119152804580322
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