Remove MBEDTLS_PSA_CRYPTO_SPM from config.pl

This configuration option has been removed by now.
diff --git a/scripts/config.pl b/scripts/config.pl
index 833b6d3..dda30bb 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -100,7 +100,6 @@
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION
 MBEDTLS_NO_64BIT_MULTIPLICATION
-MBEDTLS_PSA_CRYPTO_SPM
 MBEDTLS_USE_PSA_CRYPTO
 _ALT\s*$
 );