fix

docs/benchmark.md

@@ -6,10 +6,3 @@ and sentences in `test.txt` with the following command.
 ```
 $ cargo run --release -p benchmark -- -i system.dic.zst < test.txt
 ```
-
-If you can guarantee that `system.dic.zst` is exported from this library,
-you can specify `--features=unchecked` for faster tokenization.
-
-```
-$ cargo run --release -p benchmark --features=unchecked -- -i system.dic.zst < test.txt
-```

map/src/main.rs

@@ -32,10 +32,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     eprintln!("Loading the dictionary...");
     let reader = zstd::Decoder::new(File::open(args.sysdic_in)?)?;
-    #[cfg(not(feature = "unchecked"))]
     let dict = Dictionary::read(reader)?;
-    #[cfg(feature = "unchecked")]
-    let dict = unsafe { Dictionary::read_unchecked(reader)? };
 
     eprintln!("Loading and doing the mapping...");
     let lmap = {