/Remove-Package {/PackagePath: | /PackageName: } Uninstalls the specified package(s) unless there are online, unprocessed ...

/Remove-Package {/PackagePath: | /PackageName:}

  Uninstalls the specified package(s) 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.

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