Delete row ('175', '20731') from daily_volatility

ticker_id 175
day 20731
implied_open 1.441405314267989
implied_high 2.379588729171493
implied_low 0.6889536414012194
implied_close 1.762070373169017
historical_open 0.6032312989227266
historical_high 0.6032312989227266
historical_low 0.6032312989227266
historical_close 0.6032312989227266
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