qga-win32: remove a redundancy code

In the first line of run_agent,it has set ga_state = s,don't need
set ga_state = s again behind.
Signed-off-by: NPeng Hao <peng.hao2@zte.com.cn>
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

qga/main.c

@@ -1314,7 +1314,7 @@ static int run_agent(GAState *s, GAConfig *config, int socket_activation)
     ga_command_state_init(s, s->command_state);
     ga_command_state_init_all(s->command_state);
     json_message_parser_init(&s->parser, process_event);
-    ga_state = s;
+
 #ifndef _WIN32
     if (!register_signal_handlers()) {
         g_critical("failed to register signal handlers");