fix some warnings and bump skulpin

Cargo.toml

@@ -10,7 +10,7 @@ euclid = "0.20.7"
 font-kit = "0.4.0"
 skribo = { git = "https://github.com/linebender/skribo" }
 lru = "0.4.3"
-skulpin = "0.5"
+skulpin = "0.5.1"
 derive-new = "0.5"
 env_logger = "0.7.1"
 rmpv = "0.4.2"

src/redraw_scheduler.rs

@@ -1,9 +1,6 @@
-use std::sync::{Arc, Mutex};
+use std::sync::Mutex;
 use std::sync::atomic::{AtomicU16, Ordering};
-use std::time::{Duration, Instant};
-use std::thread;
-
-use skulpin::winit::window::Window;
+use std::time::Instant;
 
 lazy_static! {
     pub static ref REDRAW_SCHEDULER: RedrawScheduler = RedrawScheduler::new();

src/renderer/caching_shaper.rs

@@ -1,12 +1,9 @@
-use std::sync::Arc;
 use std::collections::HashMap;
 
 use lru::LruCache;
-use skulpin::skia_safe::{TextBlob, Font as SkiaFont, FontStyle, Typeface, TextBlobBuilder, Data};
+use skulpin::skia_safe::{TextBlob, Font as SkiaFont, Typeface, TextBlobBuilder, Data};
 use font_kit::{source::SystemSource, metrics::Metrics, properties::Properties, family_name::FamilyName};
-use skribo::{layout_run, LayoutSession, FontRef as SkriboFont, FontFamily, FontCollection, TextStyle};
-
-use crate::error_handling::OptionPanicExplanation;
+use skribo::{LayoutSession, FontRef as SkriboFont, FontFamily, FontCollection, TextStyle};
 
 const STANDARD_CHARACTER_STRING: &'static str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";