Delete row ('40', '20725') from daily_volatility

ticker_id 40
day 20725
implied_open 0.5190964072308727
implied_high 0.530208562737344
implied_low 0.5000469977912076
implied_close 0.5000469977912076
historical_open 0.3952752458730499
historical_high 0.3952752458730499
historical_low 0.3952752458730499
historical_close 0.3952752458730499
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