ninja{-fortran}: make pkgs nonvirtual (fix #11628) (#11629)

etc/spack/defaults/packages.yaml

@@ -36,8 +36,6 @@ packages:
       mpe: [mpe2]
       mpi: [openmpi, mpich]
       mysql-client: [mysql, mariadb-c-client]
-      ninja: [ninja, ninja-fortran]
-      ninja-fortran: [ninja-fortran, ninja@kitware]
       opencl: [pocl]
       openfoam: [openfoam-com, openfoam-org, foam-extend]
       pil: [py-pillow]

var/spack/repos/builtin/packages/ninja-fortran/package.py

@@ -27,8 +27,6 @@ class NinjaFortran(Package):
 
     depends_on('python', type='build')
 
-    provides('ninja')
-
     phases = ['configure', 'install']
 
     def url_for_version(self, version):

var/spack/repos/builtin/packages/ninja/package.py

@@ -24,8 +24,6 @@ class Ninja(Package):
 
     depends_on('python', type='build')
 
-    provides('ninja-fortran', when='@kitware')
-
     phases = ['configure', 'install']
 
     def configure(self, spec, prefix):