Delete row ('510', '20147') from daily_volatility

ticker_id 510
day 20147
implied_open 0.6127560036425592
implied_high 0.627043060722308
implied_low 0.5619575784701191
implied_close 0.5619575784701191
historical_open 0.8175371551189585
historical_high 0.8175371551189585
historical_low 0.8175371551189585
historical_close 0.8175371551189585
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