Fix: remove a useless module open (List) that breaks the build/ocaml4.07.0

3 jobs for master in 3 minutes and 48 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #93915
build

00:01:44

 
  Test
passed #93916
allowed to fail
test_opam_test

00:01:39

 
  Release
passed #93917
release

00:00:24