Delete row ('40', '20699') from daily_volatility

ticker_id 40
day 20699
implied_open 0.5175089564442339
implied_high 0.5254462103774277
implied_low 0.5095717025110401
implied_close 0.5159215056575952
historical_open 0.5143340548709564
historical_high 0.5143340548709564
historical_low 0.5143340548709564
historical_close 0.5143340548709564
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