SPELL=llvm15
         VERSION=15.0.7
      PATCHLEVEL=2
         ARCHIVE=off
     GATHER_DOCS=off
      LICENSE[0]=BSD
        WEB_SITE="https://llvm.org"
         ENTERED=20230330
           SHORT="deprecated, superseded by llvm:15"
cat << EOF
Deprecated in favour of slot 15 of the llvm spell, which builds the same
llvm into the same /opt/llvm15.

Casting this dispels it and casts llvm:15 in its place.
EOF