Remove some unused fields

Change-Id: Id38833b329b0d661fb18e8a75b671379effe82a6
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/61166
Auto-Submit: David Benjamin <[email protected]>
Commit-Queue: Bob Beck <[email protected]>
Reviewed-by: Bob Beck <[email protected]>
(cherry picked from commit 9ad0e9d7da6372ca61e137610999e5683d7a9749)

Author: davidben

crypto/x509/by_dir.c

@@ -81,7 +81,6 @@ typedef struct lookup_dir_entry_st {
 } BY_DIR_ENTRY;
 
 typedef struct lookup_dir_st {
-  BUF_MEM *buffer;
   STACK_OF(BY_DIR_ENTRY) *dirs;
 } BY_DIR;
 
@@ -141,10 +140,6 @@ static int new_dir(X509_LOOKUP *lu) {
   if ((a = (BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL) {
     return 0;
   }
-  if ((a->buffer = BUF_MEM_new()) == NULL) {
-    OPENSSL_free(a);
-    return 0;
-  }
   a->dirs = NULL;
   lu->method_data = a;
   return 1;
@@ -175,7 +170,6 @@ static void free_dir(X509_LOOKUP *lu) {
   BY_DIR *a = lu->method_data;
   if (a != NULL) {
     sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
-    BUF_MEM_free(a->buffer);
     OPENSSL_free(a);
   }
 }

crypto/x509/internal.h

@@ -275,7 +275,6 @@ struct x509_lookup_method_st {
 // function is then called to actually check the cert chain.
 struct x509_store_st {
   // The following is a cache of trusted certs
-  int cache;                    // if true, stash any hits
   STACK_OF(X509_OBJECT) *objs;  // Cache of all objects
   CRYPTO_MUTEX objs_lock;
 

crypto/x509/x509_lu.c

@@ -173,7 +173,6 @@ X509_STORE *X509_STORE_new(void) {
   if (ret->objs == NULL) {
     goto err;
   }
-  ret->cache = 1;
   ret->get_cert_methods = sk_X509_LOOKUP_new_null();
   if (ret->get_cert_methods == NULL) {
     goto err;