Delete row ('211', '20748') from daily_volatility

ticker_id 211
day 20748
implied_open 0.7492767712934921
implied_high 0.847698720065095
implied_low 0.6810163874680256
implied_close 0.7064156000542456
historical_open 0.7445144189335758
historical_high 0.7445144189335758
historical_low 0.7445144189335758
historical_close 0.7445144189335758
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