/Remove-Package {/PackagePath: | /PackageName: } Removes one or more packages unless there are online, unprocessed pending ...

/Remove-Package {/PackagePath: | /PackageName:}
 
  Removes one or more packages unless there are online, unprocessed pending 
  actions. If online actions are pending, the resources remain in the image and
  the package state is set to Uninstall Requested. You must boot the image to 
  process pending actions before the package can be removed.

  You cannot use this command to remove .msu files.

    Examples:
      DISM.exe /Image:C:\test\offline /Remove-Package 
        /PackagePath:C:\MyPackages\package.cab
          
      DISM.exe /Image:C:\test\offline /Remove-Package 
        /PackageName:Microsoft.Windows.Calc.Demo~6595b6144ccf1df~x86~en~1.0.0.0