Delete row ('4', '20714') from daily_volatility

ticker_id 4
day 20714
implied_open 0.4841724899248201
implied_high 0.4952846454312914
implied_low 0.4730603344183488
implied_close 0.4762352359916263
historical_open 0.3698760332868298
historical_high 0.3698760332868298
historical_low 0.3698760332868298
historical_close 0.3698760332868298
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