Delete row ('40', '20308') from daily_volatility

ticker_id 40
day 20308
implied_open 0.3143152557544734
implied_high 0.3190776081143896
implied_low 0.3016156494613633
implied_close 0.3095529033945571
historical_open 0.2206556593427869
historical_high 0.2206556593427869
historical_low 0.2206556593427869
historical_close 0.2206556593427869
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