Delete row ('49', '20713') from daily_volatility

ticker_id 49
day 20713
implied_open 0.3984501474463274
implied_high 0.4159121060993537
implied_low 0.3825756395799398
implied_close 0.3936877950864111
historical_open 0.4413113186855737
historical_high 0.4413113186855737
historical_low 0.4413113186855737
historical_close 0.4413113186855737
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