Delete row ('862', '20710') from daily_volatility

ticker_id 862
day 20710
implied_open 0.9667575290630015
implied_high 1.100103395140657
implied_low 0.9667575290630015
implied_close 1.033430462101829
historical_open 1.174713582112678
historical_high 1.174713582112678
historical_low 1.174713582112678
historical_close 1.174713582112678
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