Delete row ('2756', '20460') from daily_volatility

ticker_id 2756
day 20460
implied_open 0.1635074310237917
implied_high 0.2555795766488395
implied_low 0.1508078247306817
implied_close 0.1714446849569855
historical_open 0.1238211613578228
historical_high 0.1238211613578228
historical_low 0.1238211613578228
historical_close 0.1238211613578228
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