[t:2992], remove freed and db

git-svn-id: file:///svn/toku/tokudb@24903 c7de825b-a66e-492c-adef-691d508d4ae1

src/ydb-internal.h

@@ -20,8 +20,6 @@ extern "C" {
 struct __toku_lock_tree;
 
 struct __toku_db_internal {
-    DB *db; // A pointer back to the DB.
-    int freed;
     int opened;
     u_int32_t open_flags;
     int open_mode;

src/ydb.c

@@ -4838,8 +4838,6 @@ static int toku_db_create(DB ** db, DB_ENV * env, u_int32_t flags) {
     }
     memset(result->i, 0, sizeof *result->i);
     result->i->dict_id = DICTIONARY_ID_NONE;
-    result->i->db = result;
-    result->i->freed = 0;
     result->i->opened = 0;
     result->i->open_flags = 0;
     result->i->open_mode = 0;