Delete row ('9', '20495') from daily_volatility

ticker_id 9
day 20495
implied_open 0.2270054624893419
implied_high 0.2349427164225357
implied_low 0.2190682085561481
implied_close 0.2285929132759806
historical_open 0.2444674211423682
historical_high 0.2444674211423682
historical_low 0.2444674211423682
historical_close 0.2444674211423682
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