Delete row ('2631', '20256') from daily_volatility

ticker_id 2631
day 20256
implied_open 0.9556453735565301
implied_high 1.246148867511422
implied_low 0.9365959641168651
implied_close 1.209637499418731
historical_open 1.355682971789496
historical_high 1.355682971789496
historical_low 1.355682971789496
historical_close 1.355682971789496
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