Delete row ('615', '20357') from daily_volatility

ticker_id 615
day 20357
implied_open 0.2587544782221169
implied_high 0.2587544782221169
implied_low 0.1952564467565668
implied_close 0.1968438975432056
historical_open 0.1587450786638754
historical_high 0.1587450786638754
historical_low 0.1587450786638754
historical_close 0.1587450786638754
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