Delete row ('2687', '20731') from daily_volatility

ticker_id 2687
day 20731
implied_open 0.7016532476943295
implied_high 0.7397520665736596
implied_low 0.5460830706037315
implied_close 0.6079936512826429
historical_open 0.6968908953344132
historical_high 0.6968908953344132
historical_low 0.6968908953344132
historical_close 0.6968908953344132
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