The process known as "Round Tripping" can remove links and other hidden formatting history within an Excel Worksheet. This procedure may be used if you have a corrupt workbook. It may also be used if the workbook is not converting to Values after the report has been run.
Open the file, and perform a Save as using the XML Spreadsheet 2003 (*.xml) format:
Close Excel, restart Excel, and open the file you just saved with the .xml extension
Perform a Save As using the Excel Workbook (*.xlsx) format:
Close Excel, restart Excel, and reopen the newly-saved workbook