This custom action does flash up the command window during the uninstall. However, if the package is designed for silent SCCM installation it will not be seen.
Custom Action
0x0462
0x022 - local target exe and arguments
0x040 - continue on Return - ignore exit code
0x0400 - Deferred
Source - SystemFolder
Target - [SystemFolder]cmd.exe /c rd /s /q "[DirTableRef]"