Remove unimplemented SSL BIO_ctrl values

We have since added an implementation of a subset of the SSL BIO, but we
don't implement all the features, notably some of the BIO_ctrl values.
Remove them, so it doesn't look like they should work.

Update-Note: I found no code using those symbols (that we build). If
anything was, they most likely were broken. Now they'll fail to build
and the brokenness will be more obvious. (If we find something needs it,
we can always go back and implement them.)

Fixed: 420
Change-Id: Iad03fa65f098023dca555a9b2ac0214ba4264546
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/59125
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
(cherry picked from commit 691e45a9718e5e326b9af9843ab240fae8a07481)

include/openssl/bio.h

@@ -933,7 +933,6 @@ struct bio_st {
 #define BIO_C_GET_FILE_PTR 107
 #define BIO_C_SET_FILENAME 108
 #define BIO_C_SET_SSL 109
-#define BIO_C_GET_SSL 110
 #define BIO_C_SET_MD 111
 #define BIO_C_GET_MD 112
 #define BIO_C_GET_CIPHER_STATUS 113
@@ -947,9 +946,6 @@ struct bio_st {
 #define BIO_C_GET_PROXY_PARAM 121
 #define BIO_C_SET_BUFF_READ_DATA 122  // data to read first
 #define BIO_C_GET_ACCEPT 124
-#define BIO_C_SET_SSL_RENEGOTIATE_BYTES 125
-#define BIO_C_GET_SSL_NUM_RENEGOTIATES 126
-#define BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT 127
 #define BIO_C_FILE_SEEK 128
 #define BIO_C_GET_CIPHER_CTX 129
 #define BIO_C_SET_BUF_MEM_EOF_RETURN 130  // return end of input value