Delete row ('543', '20494') from daily_volatility

ticker_id 543
day 20494
implied_open 0.9350085133302264
implied_high 0.9492955704099751
implied_low 0.9286587101836714
implied_close 0.9365959641168651
historical_open 0.7857881393861835
historical_high 0.7857881393861835
historical_low 0.7857881393861835
historical_close 0.7857881393861835
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