server: remove error value from LOG_INFO

the error values is not part of the interface to the user,
so they should never be printed in LOG_INFO or LOG_USER.

Printing them in LOG_DEBUG() rarely makes much sense but
is OK.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

src/server/server.c

@@ -485,7 +485,7 @@ int server_loop(struct command_context *command_context)
 								shutdown_openocd = 1;
 							}
 							remove_connection(service, c);
-							LOG_INFO("dropped '%s' connection - error %d", service->name, retval);
+							LOG_INFO("dropped '%s' connection", service->name);
 							c = next;
 							continue;
 						}