Delete row ('331', '20689') from daily_volatility

ticker_id 331
day 20689
implied_open 0.8524610724250111
implied_high 0.9080218499573676
implied_low 0.8524610724250111
implied_close 0.8937347928776188
historical_open 1.301709645043779
historical_high 1.301709645043779
historical_low 1.301709645043779
historical_close 1.301709645043779
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