Delete row ('763', '20733') from daily_volatility

ticker_id 763
day 20733
implied_open 0.414324655312715
implied_high 0.5079842517244014
implied_low 0.3936877950864111
implied_close 0.4841724899248201
historical_open 0.2746289860885045
historical_high 0.2746289860885045
historical_low 0.2746289860885045
historical_close 0.2746289860885045
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