fix: packages:all:prefer does not allow any_of

spack-environment/packages.yaml

@@ -13,9 +13,6 @@ packages:
   all:
     prefer: # is not overwritten below, but less strict than require
     - '%gcc'
-    - any_of: [+ipo, '@:']
-    - any_of: [build_system=cmake, '@:']
-    - any_of: [build_type=Release, '@:']
     require: # is overwritten by package-specific requirements below
     - '%gcc'
     - any_of: [+ipo, '@:']