Remove download command, keep download directory. (#586)

This still allows loading from the download directory, but removes the
command that would download to it, allowing people to populate it
themselves.

The files downloaded were parsed with the `vello_svg` parser, but that
was removed from here and moved to its own home, so files loaded would
need some preprocessing (to be defined elsewhere).

README.md

@@ -142,13 +142,6 @@ It also includes a collection of test scenes showing the capabilities of `vello`
 cargo run -p with_winit
 ```
 
-Some default test scenes can be downloaded from Wikimedia Commons using the `download` subcommand.
-This also supports downloading from user-provided URLS.
-
-```shell
-cargo run -p with_winit -- download
-```
-
 <!-- ### Headless -->
 
 ### Bevy

examples/headless/src/main.rs

@@ -6,7 +6,7 @@ use std::num::NonZeroUsize;
 use std::path::{Path, PathBuf};
 
 use anyhow::{anyhow, bail, Context, Result};
-use clap::{CommandFactory, Parser};
+use clap::Parser;
 use scenes::{ImageCache, SceneParams, SceneSet, SimpleText};
 use vello::kurbo::{Affine, Vec2};
 use vello::util::RenderContext;
@@ -20,7 +20,7 @@ fn main() -> Result<()> {
     #[cfg(not(target_arch = "wasm32"))]
     env_logger::init();
     let args = Args::parse();
-    let scenes = args.args.select_scene_set(Args::command)?;
+    let scenes = args.args.select_scene_set()?;
     if let Some(scenes) = scenes {
         let mut scene_idx = None;
         for (idx, scene) in scenes.scenes.iter().enumerate() {

examples/scenes/Cargo.toml

@@ -19,11 +19,5 @@ instant = { workspace = true }
 # for pico_svg
 roxmltree = "0.19.0"
 
-# Used for the `download` command
-[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-byte-unit = "4.0.19"
-inquire = "0.7.5"
-ureq = "2.9.7"
-
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 getrandom = { version = "0.2.15", features = ["js"] }