The following Excel-related classes in cm.abstact.interop.excelObj.cm are now removed in 14.5. Please use cm.core.msOffice.excel to access Excel-related APIs.
// cm.abstract.interop.excelObj.cm Removed: public class ExcelObj extends NetObj : deprecated Removed: public class ExcelWorkbook extends NetObj : deprecated Removed: public class ExcelSheet extends NetObj : deprecated Removed: public class ExcelRange extends NetObj : deprecated
With this change, dependency to cm.abstact.interop can now be removed from extension.xml, if it was only added to access Excel APIs. As for cm.core.msOffice.excel, it is shipped under cet.designer, hence if the extension.xml already has dependency to cet.designer, it is not required to add dependency to cm.core.msOffice.excel.