External package xz was removed from Redoak.

config-hlrs/packages.yaml

@@ -59,6 +59,8 @@ packages:
     require: '%gcc@7.5'
   zlib-ng:
     require: '%gcc@7.5'
+  xz:
+    require: '%gcc@7.5'
 # packages which have been discovered by spack external find --all
   python:
     externals:
@@ -120,11 +122,6 @@ packages:
     - spec: subversion@1.14.1
       prefix: /usr
     buildable: false
-  xz:
-    externals:
-    - spec: xz@5.2.3
-      prefix: /usr
-    buildable: false
   lustre:
     externals:
     - spec: lustre@2.15.0.7_rc2_cray_25_ga33b7d9