chore: cleanup of unncessary files & adjust gitignores

harmony_composer/src/main.rs

@@ -155,6 +155,7 @@ async fn compile_harmony(
 
     let cargo_exists = Command::new("which")
         .arg("cargo")
+        .stdout(Stdio::null())
         .status()
         .expect("couldn't get `which cargo` status")
         .success();