Remove redundant hash len check
Remove redundant hash len check

Remove a check in rsa_rsassa_pkcs1_v15_encode() that
is not needed because the same check is performed
earlier. This check was added in #4707.

Signed-off-by: David Horstmann <0386b5e8f8e5ea8a58d40026a5369df20e1c750d@arm.com>

NXPmicro/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,ARMmbed/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls,Mbed-TLS/mbedtls,Mbed-TLS/mbedtls,NXPmicro/mbedtls