cmake: handle unrecognized remote modules

These modules do not exist if remote modules are never enabled, so are
unrecognized. Remove them from the list of unrecognized modules later.
Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

failed paraview@master-dres-osx-shared-release+gui+python2

failed paraview@master-luigi-linux-shared-release+gui+mpi+python2

failed paraview@master-nemesis-windows-shared-release+gui+kits+mpi+python2

passed paraview@master-nemesis-windows-shared-release+gui+mpi

failed paraview@master-taanab-linux-shared-release+adios2+mpi+python2

failed paraview@master-taanab-linux-static-release+adios2+mpi+offscreen+osmesa+python2

failed paraview@master-tylo-windows-shared-release+gui+python3+qtmin+tbb

failed paraview@master-tylo-windows-shared-release+gui+python3+tbb

failed paraview@master-vall-linux-shared-debug+adios2+doc+extdeps+gui+mpi+python3

failed paraview@master-dres-osx-shared-release+gui+python2

00:01:22

failed paraview@master-luigi-linux-shared-release+gui+mpi+python2

00:01:05

failed paraview@master-nemesis-windows-shared-release+gui+kits+mpi+python2

00:01:46

passed paraview@master-nemesis-windows-shared-release+gui+mpi

00:52:16

failed paraview@master-taanab-linux-shared-release+adios2+mpi+python2

00:00:52

failed paraview@master-taanab-linux-static-release+adios2+mpi+offscreen+osmesa+python2

00:00:41

failed paraview@master-tylo-windows-shared-release+gui+python3+qtmin+tbb

00:00:40

failed paraview@master-tylo-windows-shared-release+gui+python3+tbb

00:00:36

failed paraview@master-vall-linux-shared-debug+adios2+doc+extdeps+gui+mpi+python3

00:00:14