Delete row ('17', '20731') from daily_volatility

ticker_id 17
day 20731
implied_open 0.4016250490196049
implied_high 0.4286117123924637
implied_low 0.3984501474463274
implied_close 0.4095623029527987
historical_open 0.3238399604743059
historical_high 0.3238399604743059
historical_low 0.3238399604743059
historical_close 0.3238399604743059
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