Silence new warning from newer toolchain

Author: christiangnrd

src/bin/julialauncher.rs

@@ -415,7 +415,7 @@ fn run_app() -> Result<i32> {
             }
 
             // replace the current process
-            std::process::Command::new(&julia_path)
+            let _ = std::process::Command::new(&julia_path)
                 .args(&new_args)
                 .exec();