Delete row ('2766', '20305') from daily_volatility

ticker_id 2766
day 20305
implied_open 0.1904940943966505
implied_high 0.2016062499031218
implied_low 0.1793819388901792
implied_close 0.1936689959699281
historical_open 0.1508078247306817
historical_high 0.1508078247306817
historical_low 0.1508078247306817
historical_close 0.1508078247306817
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