Delete row ('1481', '20451') from daily_volatility

ticker_id 1481
day 20451
implied_open 0.7095905016275231
implied_high 0.7492767712934921
implied_low 0.7080030508408844
implied_close 0.7492767712934921
historical_open 0.9238963578237551
historical_high 0.9238963578237551
historical_low 0.9238963578237551
historical_close 0.9238963578237551
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