[mbed-tls] 3.0 proposal: remove MBEDTLS_CHECK_PARAMS

Hello,

I propose to remove the MBEDTLS_CHECK_PARAMS feature from Mbed TLS 3.0. (As with everything else, it will of course remain in the 2.16 and 2.2x long-time support branches.)

If you are using MBEDTLS_CHECK_PARAMS and you think it should remain, please let us know and explain why.

If you are not using this feature, I personally think that you're making the right choice. But if you're curious what it is, you can read the documentation or my description in https://github.com/ARMmbed/mbedtls/issues/4313 .