Delete row ('1764', '20469') from daily_volatility

ticker_id 1764
day 20469
implied_open 0.4746477852049876
implied_high 0.4873473914980976
implied_low 0.4571858265519613
implied_close 0.4762352359916263
historical_open 0.3873379919398561
historical_high 0.3873379919398561
historical_low 0.3873379919398561
historical_close 0.3873379919398561
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