Delete row ('40', '20172') from daily_volatility

ticker_id 40
day 20172
implied_open 0.2190682085561481
implied_high 0.2206556593427869
implied_low 0.2079560530496768
implied_close 0.2111309546229543
historical_open 0.3746383856467461
historical_high 0.3746383856467461
historical_low 0.3746383856467461
historical_close 0.3746383856467461
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