Delete row ('1961', '20572') from daily_volatility

ticker_id 1961
day 20572
implied_open 0.2016062499031218
implied_high 0.2143058561962319
implied_low 0.2016062499031218
implied_close 0.2111309546229543
historical_open 0.2143058561962319
historical_high 0.2143058561962319
historical_low 0.2143058561962319
historical_close 0.2143058561962319
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