Delete row ('40', '20298') from daily_volatility

ticker_id 40
day 20298
implied_open 0.2349427164225357
implied_high 0.2397050687824519
implied_low 0.2333552656358969
implied_close 0.2365301672091744
historical_open 0.3238399604743059
historical_high 0.3238399604743059
historical_low 0.3238399604743059
historical_close 0.3238399604743059
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