Delete row ('1177', '20675') from daily_volatility

ticker_id 1177
day 20675
implied_open 0.6587920764550831
implied_high 0.6587920764550831
implied_low 0.6429175685886955
implied_close 0.6476799209486118
historical_open 0.6508548225218893
historical_high 0.6508548225218893
historical_low 0.6508548225218893
historical_close 0.6508548225218893
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