Delete row ('2758', '20668') from daily_volatility

ticker_id 2758
day 20668
implied_open 0.2571670274354782
implied_high 0.2619293797953945
implied_low 0.2492297735022844
implied_close 0.2571670274354782
historical_open 0.2412925195690907
historical_high 0.2412925195690907
historical_low 0.2412925195690907
historical_close 0.2412925195690907
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