Delete row ('40', '20307') from daily_volatility

ticker_id 40
day 20307
implied_open 0.284153690808337
implied_high 0.3206650589010284
implied_low 0.2746289860885045
implied_close 0.3159027065411121
historical_open 0.2206556593427869
historical_high 0.2206556593427869
historical_low 0.2206556593427869
historical_close 0.2206556593427869
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