Delete row ('1992', '20692') from daily_volatility

ticker_id 1992
day 20692
implied_open 0.4714728836317101
implied_high 0.5111591532976789
implied_low 0.4476611218321287
implied_close 0.4857599407114588
historical_open 0.6619669780283606
historical_high 0.6619669780283606
historical_low 0.6619669780283606
historical_close 0.6619669780283606
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