Cleanup following the removal of MBEDTLS_ECDSA_C option

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/scripts/depends.py b/tests/scripts/depends.py
index 755585d..347634c 100755
--- a/tests/scripts/depends.py
+++ b/tests/scripts/depends.py
@@ -279,8 +279,7 @@
     'PSA_WANT_ECC_SECP_K1_192': ['MBEDTLS_ECP_DP_SECP192K1_ENABLED'],
 
     'PSA_WANT_ALG_ECDSA': ['PSA_WANT_ALG_DETERMINISTIC_ECDSA',
-                           'MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED',
-                           'MBEDTLS_ECDSA_C'],
+                           'MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED'],
     'PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_BASIC': [
         'PSA_WANT_ALG_ECDSA',
         'PSA_WANT_ALG_ECDH',