It is important to manually remove this information from the Properties of any Word files submitted to reviewers. There is no built-in utility in OJS for this.
However, the following line should be included in the author submission checklist:
"The author's name has also been removed from the document's Properties, which in Microsoft Word is found in the File menu."
You may wish to make it a separate checklist item for emphasis.
Also, if you submit PDFs, you can use the PDF Anonymization Utility:
PKP Support Team