Remove unused port_range field

The port_range is used from "struct server_params", the copy in
"struct server" was unused.

app/src/server.c

@@ -378,8 +378,6 @@ server_init(struct server *server) {
     server->video_socket = INVALID_SOCKET;
     server->control_socket = INVALID_SOCKET;
 
-    server->port_range.first = 0;
-    server->port_range.last = 0;
     server->local_port = 0;
 
     server->tunnel_enabled = false;
@@ -413,8 +411,6 @@ run_wait_server(void *data) {
 bool
 server_start(struct server *server, const char *serial,
              const struct server_params *params) {
-    server->port_range = params->port_range;
-
     if (serial) {
         server->serial = SDL_strdup(serial);
         if (!server->serial) {

app/src/server.h

@@ -26,7 +26,6 @@ struct server {
     socket_t server_socket; // only used if !tunnel_forward
     socket_t video_socket;
     socket_t control_socket;
-    struct sc_port_range port_range;
     uint16_t local_port; // selected from port_range
     bool tunnel_enabled;
     bool tunnel_forward; // use "adb forward" instead of "adb reverse"