Delete row ('2687', '20608') from daily_volatility

ticker_id 2687
day 20608
implied_open 0.8762728342245925
implied_high 0.8762728342245925
implied_low 0.8159497043323198
implied_close 0.8159497043323198
historical_open 0.788963040959461
historical_high 0.788963040959461
historical_low 0.788963040959461
historical_close 0.788963040959461
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