Delete row ('1961', '20042') from daily_volatility

ticker_id 1961
day 20042
implied_open 0.1428705707974879
implied_high 0.1476329231574041
implied_low 0.1333458660776554
implied_close 0.1460454723707654
historical_open 0.1555701770905979
historical_high 0.1555701770905979
historical_low 0.1555701770905979
historical_close 0.1555701770905979
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