Removed dependency `duration-string`, now printing `duration` in milliseconds

Cargo.toml

@@ -7,4 +7,3 @@ edition = "2021"
 reCTBN = { path = "deps/reCTBN/reCTBN", package = "reCTBN", version="0.1.0" }
 json = "0.12.*"
 csv = "1.2.*"
-duration-string = "0.2.*"

src/main.rs

@@ -1,7 +1,6 @@
 #![allow(non_snake_case)]
 
 use csv;
-use duration_string::DurationString;
 use json;
 use std::collections::BTreeSet;
 use std::fs;
@@ -163,7 +162,7 @@ fn main() {
                     .unwrap()
                     .to_string(),
                 parsed_json[idx]["density"].as_f64().unwrap().to_string(),
-                DurationString::from(duration).to_string(),
+                duration.as_millis().to_string(),
             ],
         )
         .unwrap();