Revert "New portal type: External Method"

This reverts commit ea53f23e.
3 jobs for wip in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.UnitTest-Romain

00:33:05

passed ERP5.UnitTest-Romain

00:34:00

passed ERP5.UnitTest-Romain

00:34:24