Removed non-used variable

BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

@@ -95,6 +95,7 @@ miguel@hegel.(none)
 miguel@hegel.br
 miguel@hegel.local
 miguel@hegel.txg
+miguel@hegel.txg.br
 miguel@light.
 miguel@light.local
 miguel@sartre.local

sql/sql_db.cc

@@ -560,7 +560,6 @@ int mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
   char	path[FN_REFLEN+16], tmp_db[NAME_LEN+1];
   MY_DIR *dirp;
   uint length;
-  my_dbopt_t *dbopt;
   DBUG_ENTER("mysql_rm_db");
 
   VOID(pthread_mutex_lock(&LOCK_mysql_create_db));