Fix clippy lints (#2560)

wgpu-core/src/device/life.rs

@@ -374,7 +374,7 @@ impl<A: hal::Api> LifetimeTracker<A> {
  .active
  .iter()
  .position(|a| a.index > last_done)
- .unwrap_or_else(|| self.active.len());
+ .unwrap_or(self.active.len());
 
  let mut work_done_closures = SmallVec::new();
  for a in self.active.drain(..done_count) {

wgpu-core/src/init_tracker/mod.rs

@@ -142,7 +142,7 @@ where
  .partition_point(|r| r.end <= query_range.start);
  self.uninitialized_ranges
  .get(index)
- .map(|start_range| {
+ .and_then(|start_range| {
  if start_range.start < query_range.end {
  let start = start_range.start.max(query_range.start);
  match self.uninitialized_ranges.get(index + 1) {
@@ -160,7 +160,6 @@ where
  None
  }
  })
- .flatten()
  }
 
  // Drains uninitialized ranges in a query range.

wgpu/examples/framework.rs

@@ -95,8 +95,7 @@ async fn setup<E: Example>(title: &str) -> Setup {
  use winit::platform::web::WindowExtWebSys;
  let query_string = web_sys::window().unwrap().location().search().unwrap();
  let level: log::Level = parse_url_query_string(&query_string, "RUST_LOG")
- .map(|x| x.parse().ok())
- .flatten()
+ .and_then(|x| x.parse().ok())
  .unwrap_or(log::Level::Error);
  console_log::init_with_level(level).expect("could not initialize logger");
  std::panic::set_hook(Box::new(console_error_panic_hook::hook));