Implement simple clippy suggestions (#159)

src/egs/get_manifests.rs

@@ -1,6 +1,4 @@
 use super::{EpicGamesLauncherSettings, ManifestItem};
-#[cfg(target_os = "windows")]
-use std::env::{self};
 
 use std::fs::{DirEntry, File};
 use std::io::BufReader;

src/egs/manifest_item.rs

@@ -94,7 +94,7 @@ fn launcher_shortcut(manifest: ManifestItem) -> ShortcutOwned {
         .as_ref()
         .map(|p| {
             p.parent()
-                .unwrap_or(Path::new(""))
+                .unwrap_or_else(||Path::new(""))
                 .to_string_lossy()
                 .to_string()
         })