Remove Warnings (#232)

* Remove Windows Warnings
* Fix linux warnings

src/sync/synchronization.rs

@@ -3,7 +3,6 @@ use tokio::sync::watch::Sender;
 
 use crate::{
     egs::EpicPlatform,
-    flatpak::FlatpakPlatform,
     legendary::LegendaryPlatform,
     lutris::lutris_platform::LutrisPlatform,
     platform::Platform,
@@ -19,6 +18,9 @@ use crate::{
 #[cfg(target_family = "unix")]
 use crate::heroic::HeroicPlatform;
 
+#[cfg(target_family = "unix")]
+use crate::flatpak::FlatpakPlatform;
+
 use std::error::Error;
 
 use crate::{gog::GogPlatform, itch::ItchPlatform, origin::OriginPlatform};