Delete row ('1992', '20147') from daily_volatility

ticker_id 1992
day 20147
implied_open 0.7476893205068534
implied_high 0.7984877456792935
implied_low 0.6667293303882769
implied_close 0.6889536414012194
historical_open 0.9873943892893052
historical_high 0.9873943892893052
historical_low 0.9873943892893052
historical_close 0.9873943892893052
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