tests: subsys: jwt: remove tests for legacy RSA support

Since support for CONFIG_JWT_SIGN_RSA_LEGACY has been removed,
corresponding tests should be removed as well.

Signed-off-by: Valerio Setti <vsetti@baylibre.com>

tests/subsys/jwt/src/jwt-test-private.c

@@ -4,7 +4,7 @@
  *
  */
 
-#if defined(CONFIG_JWT_SIGN_RSA_PSA) || defined(CONFIG_JWT_SIGN_RSA_LEGACY)
+#if defined(CONFIG_JWT_SIGN_RSA_PSA)
 
 /* To generate the key in the correct format use the following command:
  * $ openssl genrsa 2048 | openssl rsa -outform DER | xxd -i

tests/subsys/jwt/testcase.yaml

@@ -19,10 +19,6 @@ tests:
       # source.
       - CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG=y
       - CONFIG_MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG_ALLOW_NON_CSPRNG=y
-  libraries.encoding.jwt.rsa.legacy:
-    filter: CSPRNG_ENABLED
-    extra_configs:
-      - CONFIG_JWT_SIGN_RSA_LEGACY=y
   libraries.encoding.jwt.rsa.psa:
     extra_configs:
       - CONFIG_JWT_SIGN_RSA_PSA=y