Remove PKCS5 from the ref config in the migration script

Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/docs/architecture/psa-migration/outcome-analysis.sh b/docs/architecture/psa-migration/outcome-analysis.sh
index a3f9f7c..67510c1 100755
--- a/docs/architecture/psa-migration/outcome-analysis.sh
+++ b/docs/architecture/psa-migration/outcome-analysis.sh
@@ -34,7 +34,6 @@
     scripts/config.py set MBEDTLS_USE_PSA_CRYPTO
     scripts/config.py unset MBEDTLS_PKCS1_V21
     scripts/config.py unset MBEDTLS_X509_RSASSA_PSS_SUPPORT
-    scripts/config.py unset MBEDTLS_PKCS5_C
     scripts/config.py unset MBEDTLS_ECDSA_DETERMINISTIC
 }
 # Space-separated list of test suites of interest.
@@ -115,4 +114,3 @@
 compare_builds before-default after-default
 compare_builds before-full after-full
 compare_builds reference drivers
-