Delete row ('1485', '20508') from daily_volatility

ticker_id 1485
day 20508
implied_open 0.3571764269937197
implied_high 0.3667011317135522
implied_low 0.3540015254204422
implied_close 0.355588976207081
historical_open 0.4317866139657412
historical_high 0.4317866139657412
historical_low 0.4317866139657412
historical_close 0.4317866139657412
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