Delete row ('510', '20266') from daily_volatility

ticker_id 510
day 20266
implied_open 0.4540109249786838
implied_high 0.465123080485155
implied_low 0.4317866139657412
implied_close 0.4492485726187675
historical_open 0.4667105312717938
historical_high 0.4667105312717938
historical_low 0.4667105312717938
historical_close 0.4667105312717938
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