The "Delete" link does not exist when the form is empty.
Test plan:
Create a new classification splitting source
Select "Regex" for routine
=> The delete link does not appear (you cannot remove if there is only
one input)
=> It a regex
=> The 2 delete links appear
Signed-off-by: Nick Clemens <nick@bywatersolutions.com> Signed-off-by: Nick Clemens <nick@bywatersolutions.com>