Delete row ('53', '20508') from daily_volatility

ticker_id 53
day 20508
implied_open 0.3492391730605259
implied_high 0.3492391730605259
implied_low 0.3365395667674159
implied_close 0.3397144683406934
historical_open 0.3667011317135522
historical_high 0.3667011317135522
historical_low 0.3667011317135522
historical_close 0.3667011317135522
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