Delete row ('615', '20564') from daily_volatility

ticker_id 615
day 20564
implied_open 0.2016062499031218
implied_high 0.2047811514763993
implied_low 0.1968438975432056
implied_close 0.2016062499031218
historical_open 0.187319192823373
historical_high 0.187319192823373
historical_low 0.187319192823373
historical_close 0.187319192823373
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