Delete row ('2398', '20731') from daily_volatility

ticker_id 2398
day 20731
implied_open 0.7445144189335758
implied_high 1.395369241455465
implied_low 0.7445144189335758
implied_close 1.0445426176083
historical_open 0.549257972177009
historical_high 0.549257972177009
historical_low 0.549257972177009
historical_close 0.549257972177009
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