Remove last use of byteorder crate

Cargo.lock

@@ -6,16 +6,9 @@ version = 3
 name = "assembler"
 version = "0.1.0"
 dependencies = [
- "byteorder",
  "nom",
 ]
 
-[[package]]
-name = "byteorder"
-version = "1.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
-
 [[package]]
 name = "memchr"
 version = "2.7.1"

Cargo.toml

@@ -6,5 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-byteorder = "1.5.0"
 nom = "7.1.3"

src/main.rs

@@ -1,4 +1,3 @@
-use byteorder::{ByteOrder, LittleEndian};
 use nom::{
     bytes::complete::take,
     number::complete::{le_i16, le_u8},
@@ -43,8 +42,7 @@ impl World {
             header: Vec::from(&bytes[0..512]),
             boards: vec![],
         };
-        // TODO: Remove LittleEndian entirely?
+        let num_boards = 1 + u16::from_le_bytes((&world.header[2..4]).try_into().unwrap());
-        let num_boards = 1 + LittleEndian::read_u16(&world.header[2..4]);
         let mut offset = world.header.len();
         for _ in 0..num_boards {
             // Ideally, this wouldn't panic if we run out of bytes