fix: Remove calls to accesskit_tree_set_app_name in examples (#31)

Author: DataTriny

examples/sdl/hello_world.c

@@ -200,7 +200,6 @@ accesskit_tree_update *window_state_build_initial_tree(
   accesskit_tree_update *result = accesskit_tree_update_with_capacity_and_focus(
       (state->announcement != NULL) ? 4 : 3, state->focus);
   accesskit_tree *tree = accesskit_tree_new(WINDOW_ID);
-  accesskit_tree_set_app_name(tree, "Hello World");
   accesskit_tree_update_set_tree(result, tree);
   accesskit_tree_update_push_node(result, WINDOW_ID, root);
   accesskit_tree_update_push_node(result, BUTTON_1_ID, button_1);

examples/windows/hello_world.c

@@ -72,7 +72,6 @@ accesskit_tree_update *build_initial_tree(void *userdata) {
   accesskit_tree_update *result = accesskit_tree_update_with_capacity_and_focus(
       (state->announcement != NULL) ? 4 : 3, state->focus);
   accesskit_tree *tree = accesskit_tree_new(WINDOW_ID);
-  accesskit_tree_set_app_name(tree, "Hello World");
   accesskit_tree_update_set_tree(result, tree);
   accesskit_tree_update_push_node(result, WINDOW_ID, root);
   accesskit_tree_update_push_node(result, BUTTON_1_ID, button_1);