Remove RSA_SSLV23_PADDING.

It's unused with SSLv2 gone. Also, being a decryption padding check, it really
should be constant-time and isn't.

Change-Id: I96be02cb50f9bf0229b9174eccd80fa338bf8e3e
Reviewed-on: https://boringssl-review.googlesource.com/1254
Reviewed-by: Adam Langley <agl@google.com>
5 files changed