Delete row ('9', '20315') from daily_volatility

ticker_id 9
day 20315
implied_open 0.2301803640626194
implied_high 0.2349427164225357
implied_low 0.2254180117027031
implied_close 0.2270054624893419
historical_open 0.2571670274354782
historical_high 0.2571670274354782
historical_low 0.2571670274354782
historical_close 0.2571670274354782
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