fix duplicate

Author: yqz562

barcode-reader/general/index.md

@@ -15,7 +15,6 @@ Please use the links below to find answers to common questions and configuration
 - [How to avoid incorrect barcode results?](avoid-incorrect-barcode-results.html)
 - [How to filter incorrect results with the barcode result length?](avoid-incorrect-results.html)
 - [Check Current Version](check-current-version.html)
-- [Does DBR support PDF?](dbr-supports-pdf.html)
 - [Different Editions of DBR](different-editions-of-dbr.html)
 - [How to scan specific pages of a pdf file?](scan-specific-page.html)
 - [How to scan US driver's license?](scan-us-drivers-license.html)