Remove 1.3 to 2.0 helpers: Python port of 7d48b2821808e964ab594462e419fbed0e015729
Remove 1.3 to 2.0 helpers: Python port of 7d48b2821808e964ab594462e419fbed0e015729

Signed-off-by: Yuto Takano <0d4e4f819ef3797eef849c0f9212ede105948585@arm.com>

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