ssl-opt: remove redundant requirement for RSA_C

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 6f688d8..0164b45 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2282,7 +2282,6 @@
 
 requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
 requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
-requires_config_enabled MBEDTLS_RSA_C
 requires_config_enabled MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED
 requires_hash_alg SHA_256
 requires_config_disabled MBEDTLS_X509_REMOVE_INFO
@@ -2303,7 +2302,6 @@
 
 requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
 requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
-requires_config_enabled MBEDTLS_RSA_C
 requires_hash_alg SHA_384
 requires_config_disabled MBEDTLS_X509_REMOVE_INFO
 run_test    "Opaque keys for server authentication: EC keys with different algs, force ECDH-ECDSA" \
@@ -2323,7 +2321,6 @@
 
 requires_config_enabled MBEDTLS_USE_PSA_CRYPTO
 requires_config_enabled MBEDTLS_X509_CRT_PARSE_C
-requires_config_enabled MBEDTLS_RSA_C
 requires_hash_alg SHA_384
 requires_config_enabled MBEDTLS_CCM_C
 requires_config_disabled MBEDTLS_X509_REMOVE_INFO