Delete row ('615', '20607') from daily_volatility

ticker_id 615
day 20607
implied_open 0.2317678148492582
implied_high 0.2381176179958132
implied_low 0.2222431101294256
implied_close 0.2254180117027031
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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