FIX: remove shared config in envs

env/sles15/x86_64/admin/stable/spack.yaml

@@ -3,9 +3,6 @@ spack:
   concretizer:
     unify: false
   config:
-    allow_sgid: false
-    build_stage:
-      - $spack/../user/$user/spack-stage
     install_tree:
       root: $spack/opt/spack/stable
   include:

env/sles15/x86_64/admin/unstable/spack.yaml

@@ -2,9 +2,6 @@ spack:
   concretizer:
     unify: false
   config:
-    allow_sgid: false
-    build_stage:
-      - $spack/../user/$user/spack-stage
     install_tree:
       root: $spack/opt/spack/unstable
   include:

env/sles15/x86_64/users/unstable/spack.yaml

@@ -1,12 +1,6 @@
 spack:
   concretizer:
     unify: false
-  config:
-    allow_sgid: false
-    build_stage:
-      - $spack/../user/$user/spack-stage
-    install_tree:
-      root: $spack/../user/$user/spack-install
   include:
   - $spack/spack-psi/env/$os/$target_family/sysconfigs/packages.yaml
   - $spack/spack-psi/env/$os/$target_family/sysconfigs/compilers.yaml