libmysql/libmysql.c : Correct a wrong automerge: Don't duplicate "DBUG_ENTER()".

libmysql/libmysql.c:
  Correct a wrong automerge: Don't duplicate "DBUG_ENTER()".

libmysql/libmysql.c

@@ -4680,7 +4680,6 @@ int cli_read_binary_rows(MYSQL_STMT *stmt)
   MYSQL_DATA *result= &stmt->result;
   MYSQL_ROWS *cur, **prev_ptr= &result->data;
   NET        *net;
-  DBUG_ENTER("cli_read_binary_rows");
 
   DBUG_ENTER("cli_read_binary_rows");