Why clean up the 'dist' directory when building for desktop?

This can affect things like extra side generating css files.

src/builder.rs

@@ -284,12 +284,6 @@ pub fn build_desktop(config: &CrateConfig, is_serve: bool) -> Result<()> {
     }
 
     if output.status.success() {
-        // this code will clean the output dir.
-        // if using the serve, we will not clean the out_dir.
-        if config.out_dir.is_dir() && !is_serve {
-            remove_dir_all(&config.out_dir)?;
-        }
-
         let release_type = match config.release {
             true => "release",
             false => "debug",