Delete row ('1512', '20749') from daily_volatility

ticker_id 1512
day 20749
implied_open 0.5651324800433966
implied_high 0.5810069879097841
implied_low 0.5460830706037315
implied_close 0.5571952261102028
historical_open 0.6587920764550831
historical_high 0.6587920764550831
historical_low 0.6587920764550831
historical_close 0.6587920764550831
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