ci: revert Frontier staging/install cleanup in build.sh

Author: sbryngelson

.github/workflows/common/build.sh

@@ -25,23 +25,9 @@ fi
 # source code is built here on the compute node.
 # Phoenix: always start fresh to avoid SIGILL from stale binaries compiled
 # on a different microarchitecture.
-# Frontier: wipe only compiled Fortran staging/install slugs; preserve dep
-# dirs (silo, hdf5, lapack, fftw, hipfort) which were built on the login node
-# and cannot be re-fetched from a compute node (no internet).
 if [ "$job_cluster" = "phoenix" ]; then
     source .github/scripts/clean-build.sh
     clean_build
-elif [ "$job_cluster" = "frontier" ] || [ "$job_cluster" = "frontier_amd" ]; then
-    for _dir in build/staging/ build/install/; do
-        if [ -d "$_dir" ]; then
-            for _sub in "$_dir"*/; do
-                _name=$(basename "$_sub")
-                case "$_name" in silo|hdf5|lapack|fftw|hipfort) continue ;; esac
-                rm -rf "$_sub"
-            done
-        fi
-    done
-    unset _dir _sub _name
 fi
 
 source .github/scripts/retry-build.sh