Remove pkey_base_id.

This is never accessed.

Change-Id: I4cade5e907ad4c03e9de7634b53ef965f7240087
Reviewed-on: https://boringssl-review.googlesource.com/6864
Reviewed-by: Adam Langley <agl@google.com>

crypto/evp/internal.h

@@ -86,7 +86,6 @@ typedef enum {
 
 struct evp_pkey_asn1_method_st {
   int pkey_id;
-  int pkey_base_id;
   unsigned long pkey_flags;
 
   const char *pem_str;

crypto/evp/p_dsa_asn1.c

@@ -550,7 +550,6 @@ err:
 }
 
 const EVP_PKEY_ASN1_METHOD dsa_asn1_meth = {
-  EVP_PKEY_DSA,
   EVP_PKEY_DSA,
   0,
 

crypto/evp/p_ec_asn1.c

@@ -529,7 +529,6 @@ static int old_ec_priv_encode(const EVP_PKEY *pkey, uint8_t **pder) {
 }
 
 const EVP_PKEY_ASN1_METHOD ec_asn1_meth = {
-  EVP_PKEY_EC,
   EVP_PKEY_EC,
   0,
   "EC",

crypto/evp/p_rsa_asn1.c

@@ -703,7 +703,6 @@ static evp_digest_sign_algorithm_result_t rsa_digest_sign_algorithm(
 }
 
 const EVP_PKEY_ASN1_METHOD rsa_asn1_meth = {
-  EVP_PKEY_RSA,
   EVP_PKEY_RSA,
   ASN1_PKEY_SIGPARAM_NULL,