Delete row ('2766', '20510') from daily_volatility

ticker_id 2766
day 20510
implied_open 0.2190682085561481
implied_high 0.2254180117027031
implied_low 0.2016062499031218
implied_close 0.2111309546229543
historical_open 0.180969389676818
historical_high 0.180969389676818
historical_low 0.180969389676818
historical_close 0.180969389676818
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