Delete row ('697', '20455') from daily_volatility

ticker_id 697
day 20455
implied_open 0.2000187991164831
implied_high 0.2047811514763993
implied_low 0.1904940943966505
implied_close 0.1936689959699281
historical_open 0.1587450786638754
historical_high 0.1587450786638754
historical_low 0.1587450786638754
historical_close 0.1587450786638754
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