Delete row ('80', '20718') from daily_volatility

ticker_id 80
day 20718
implied_open 0.2190682085561481
implied_high 0.2349427164225357
implied_low 0.2079560530496768
implied_close 0.2222431101294256
historical_open 0.1952564467565668
historical_high 0.1952564467565668
historical_low 0.1952564467565668
historical_close 0.1952564467565668
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