Delete row ('1670', '20712') from daily_volatility

ticker_id 1670
day 20712
implied_open 0.7095905016275231
implied_high 0.7127654032008007
implied_low 0.6651418796016381
implied_close 0.6810163874680256
historical_open 0.7715010823064347
historical_high 0.7715010823064347
historical_low 0.7715010823064347
historical_close 0.7715010823064347
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