Delete row ('297', '20318') from daily_volatility

ticker_id 297
day 20318
implied_open 0.2190682085561481
implied_high 0.2285929132759806
implied_low 0.2190682085561481
implied_close 0.2222431101294256
historical_open 0.2174807577695094
historical_high 0.2174807577695094
historical_low 0.2174807577695094
historical_close 0.2174807577695094
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