Delete row ('331', '20493') from daily_volatility

ticker_id 331
day 20493
implied_open 1.138202214019987
implied_high 1.190588089979066
implied_low 1.135027312446709
implied_close 1.139789664806626
historical_open 1.135027312446709
historical_high 1.135027312446709
historical_low 1.135027312446709
historical_close 1.135027312446709
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