skip unnecessary set_icon() during build script (fix #681)

build.rs

@@ -1,6 +1,3 @@
-#[cfg(windows)]
-extern crate winres;
-
 use std::env;
 use std::fs::File;
 use std::io::{BufRead, BufReader, BufWriter, Write};
@@ -19,19 +16,9 @@ fn main() {
     println!("cargo:rerun-if-changed={WINDOWS_ICON_PATH}");
     println!("cargo:rerun-if-changed={SERVICES_LIST_PATH}");
 
-    set_icon();
     build_services_phf();
 }
 
-fn set_icon() {
-    #[cfg(windows)]
-    {
-        let mut res = winres::WindowsResource::new();
-        res.set_icon(WINDOWS_ICON_PATH);
-        res.compile().unwrap();
-    }
-}
-
 fn build_services_phf() {
     let out_path = Path::new(&env::var("OUT_DIR").unwrap()).join("services.rs");
     let mut output = BufWriter::new(File::create(out_path).unwrap());