Delete row ('600', '20514') from daily_volatility

ticker_id 600
day 20514
implied_open 0.8080124503991261
implied_high 0.898497145237535
implied_low 0.8080124503991261
implied_close 0.86674812950476
historical_open 1.028668109741913
historical_high 1.028668109741913
historical_low 1.028668109741913
historical_close 1.028668109741913
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