Delete row ('1961', '20558') from daily_volatility

ticker_id 1961
day 20558
implied_open 0.2460548719290069
implied_high 0.252404675075562
implied_low 0.2460548719290069
implied_close 0.2508172242889232
historical_open 0.1889066436100118
historical_high 0.1889066436100118
historical_low 0.1889066436100118
historical_close 0.1889066436100118
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