Delete row ('2687', '20186') from daily_volatility

ticker_id 2687
day 20186
implied_open 0.8524610724250111
implied_high 0.8937347928776188
implied_low 0.7572140252266859
implied_close 0.8683355802913987
historical_open 0.6841912890413031
historical_high 0.6841912890413031
historical_low 0.6841912890413031
historical_close 0.6841912890413031
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