Delete row ('193', '20497') from daily_volatility

ticker_id 193
day 20497
implied_open 0.769913631519796
implied_high 0.8175371551189585
implied_low 0.7095905016275231
implied_close 0.7381646157870208
historical_open 0.9572328243431689
historical_high 0.9572328243431689
historical_low 0.9572328243431689
historical_close 0.9572328243431689
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