fix(compose): revert slice conversion in tests and remove unused var in warichu

crates/compose/src/tests.rs

@@ -2892,7 +2892,7 @@ fn test_font(family: &str, os2_fields: Option<&[(usize, i16)]>) -> Vec<u8> {
 
 /// [`test_font`] with OS/2 `sTypoAscender` set to `typo_ascender`, or without OS/2 for `None`.
 fn typo_test_font(family: &str, typo_ascender: Option<i16>) -> Vec<u8> {
-    test_font(family, typo_ascender.map(|v| [(TYPO_ASCENDER, v)]).as_ref().map(<[_]>::as_slice))
+    test_font(family, typo_ascender.map(|v| [(TYPO_ASCENDER, v)]).as_ref().map(|f| f.as_slice()))
 }
 
 /// First baseline (frame space) of a 20 pt line in `family` in a frame at y = 36 with a 4 pt top

crates/compose/src/warichu.rs

@@ -217,7 +217,6 @@ fn layout(styles: &[RunStyle], line: &mut [PlacedGlyph], members: &[usize]) -> f
         restore(line, members, &saved);
         return 0.0;
     }
-    let rows = counts.len().max(1);
     let small = st.size * scale;
     // 0 is the default (one small em). Any other value, including a negative one, is added to
     // that em and then clamped so the rows cannot swap order.