Delete row ('867', '20734') from daily_volatility

ticker_id 867
day 20734
implied_open 0.2397050687824519
implied_high 0.2492297735022844
implied_low 0.2285929132759806
implied_close 0.2428799703557294
historical_open 0.1920815451832893
historical_high 0.1920815451832893
historical_low 0.1920815451832893
historical_close 0.1920815451832893
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