Delete row ('1961', '20536') from daily_volatility

ticker_id 1961
day 20536
implied_open 0.2619293797953945
implied_high 0.265104281368672
implied_low 0.252404675075562
implied_close 0.2571670274354782
historical_open 0.2063686022630381
historical_high 0.2063686022630381
historical_low 0.2063686022630381
historical_close 0.2063686022630381
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