Fix clippy warnings: needless_range_loop, collapsible_if, borrowed_box, type_complexity, dead code cleanup

crates/palette-compress/src/palette.rs

@@ -84,6 +84,12 @@ pub struct BlockPalette {
     index_map: HashMap<BlockState, u32>,
 }
 
+impl Default for BlockPalette {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl BlockPalette {
     pub fn new() -> Self {
         BlockPalette {

crates/palette-compress/src/section.rs

@@ -10,6 +10,12 @@ pub struct SectionData {
     pub storage: BitArray,
 }
 
+impl Default for SectionData {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl SectionData {
     /// Create a new section filled with air.
     pub fn new() -> Self {