psasim: small fixes to all.sh and test bash scripts

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index f216f16..7f4c2a3 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -379,8 +379,7 @@
 helper_psasim_cleanup_before_client() {
     # Clean up library files
     make -C library clean
-    # Clean up intermediate files that were used to build the server
-    make -C $PSASIM_PATH clean_server_intermediate_files
+
     # Restore files that were backup before building library files. This
     # includes $CONFIG_H and $CRYPTO_CONFIG_H.
     for x in $files_to_back_up; do