/Delete-Image /ImageFile: {/Index: | /Name: } /CheckIntegrity Deletes the specified volume image from a WIM file that has ...

/Delete-Image /ImageFile: 
  {/Index: | /Name:} [/CheckIntegrity] 

  Deletes the specified volume image from a WIM file that has multiple 
  volume images. 
  Use /CheckIntegrity to detect and track WIM file corruption. 

    Example: 
      DISM.exe /Delete-Image /ImageFile:install.wim /Index:1