Delete row ('2770', '19970') from daily_volatility

ticker_id 2770
day 19970
implied_open 0.2095435038363156
implied_high 0.2174807577695094
implied_low 0.2047811514763993
implied_close 0.2143058561962319
historical_open 0.2190682085561481
historical_high 0.2190682085561481
historical_low 0.2190682085561481
historical_close 0.2190682085561481
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