Delete row ('2749', '20731') from daily_volatility

ticker_id 2749
day 20731
implied_open 0.3794007380066624
implied_high 0.4254368108191862
implied_low 0.3762258364333848
implied_close 0.4032124998062436
historical_open 0.3111403541811958
historical_high 0.3111403541811958
historical_low 0.3111403541811958
historical_close 0.3111403541811958
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