Remove mode param from mbedtls_rsa_rsaes_pkcs1_v15_decrypt

Remove mode param from mbedtls_rsa_rsaes_pkcs1_v15_decrypt
and also modify and remove relevant tests.

Signed-off-by: Thomas Daubney <thomas.daubney@arm.com>
diff --git a/include/mbedtls/rsa.h b/include/mbedtls/rsa.h
index c366623..a4ef488 100644
--- a/include/mbedtls/rsa.h
+++ b/include/mbedtls/rsa.h
@@ -755,24 +755,15 @@
  *                 hold the decryption of the particular ciphertext provided,
  *                 the function returns #MBEDTLS_ERR_RSA_OUTPUT_TOO_LARGE.
  *
- * \deprecated     It is deprecated and discouraged to call this function
- *                 in #MBEDTLS_RSA_PUBLIC mode. Future versions of the library
- *                 are likely to remove the \p mode argument and have it
- *                 implicitly set to #MBEDTLS_RSA_PRIVATE.
- *
  * \note           Alternative implementations of RSA need not support
  *                 mode being set to #MBEDTLS_RSA_PUBLIC and might instead
  *                 return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
  *
  * \param ctx      The initialized RSA context to use.
- * \param f_rng    The RNG function. If \p mode is #MBEDTLS_RSA_PRIVATE,
- *                 this is used for blinding and should be provided; see
- *                 mbedtls_rsa_private() for more. If \p mode is
- *                 #MBEDTLS_RSA_PUBLIC, it is ignored.
+ * \param f_rng    The RNG function. This is used for blinding and should
+ *                 be provided; see mbedtls_rsa_private() for more.
  * \param p_rng    The RNG context to be passed to \p f_rng. This may be
  *                 \c NULL if \p f_rng is \c NULL or doesn't need a context.
- * \param mode     The mode of operation. This must be either
- *                 #MBEDTLS_RSA_PRIVATE or #MBEDTLS_RSA_PUBLIC (deprecated).
  * \param olen     The address at which to store the length of
  *                 the plaintext. This must not be \c NULL.
  * \param input    The ciphertext buffer. This must be a readable buffer
@@ -789,7 +780,7 @@
 int mbedtls_rsa_rsaes_pkcs1_v15_decrypt( mbedtls_rsa_context *ctx,
                                  int (*f_rng)(void *, unsigned char *, size_t),
                                  void *p_rng,
-                                 int mode, size_t *olen,
+                                 size_t *olen,
                                  const unsigned char *input,
                                  unsigned char *output,
                                  size_t output_max_len );