fix compile errs

src/main.rs

@@ -32,8 +32,6 @@ fn replace_links(input: &str) -> String {
     intermediate.replace("]", "** ")
 }
 
-fn add_github_link(input: &str, name: &str, file: &DirEntry) -> String {}
-
 fn render(input: &str) -> String {
     let mut skin = MadSkin::default();
     skin.set_headers_fg(rgb(255, 187, 0));
@@ -74,7 +72,7 @@ fn copy_readme(file: &DirEntry, readme_dir: PathBuf, url: &str) {
 
     let _ = std::fs::copy(file.path(), &readme_path);
     let mut readme_file = fs::File::options().append(true).open(readme_path).unwrap();
-    writeln!(readme_file, "\n[{} Github]({})", file_name, url);
+    let _ = writeln!(readme_file, "\n[{} Github]({})", file_name, url);
 }
 
 fn get_file_name(file: &DirEntry) -> String {