Delete row ('615', '20342') from daily_volatility

ticker_id 615
day 20342
implied_open 0.252404675075562
implied_high 0.2539921258622007
implied_low 0.2492297735022844
implied_close 0.2492297735022844
historical_open 0.1555701770905979
historical_high 0.1555701770905979
historical_low 0.1555701770905979
historical_close 0.1555701770905979
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