Remove unneeded returns

lib/emscripten/src/process.rs

@@ -159,7 +159,7 @@ pub fn _system(_ctx: &mut Ctx, _one: i32) -> c_int {
     debug!("emscripten::_system");
     // TODO: May need to change this Em impl to a working version
     eprintln!("Can't call external programs");
-    return EAGAIN;
+    EAGAIN
 }
 
 pub fn _popen(_ctx: &mut Ctx, _one: i32, _two: i32) -> c_int {

lib/emscripten/src/time.rs

@@ -345,7 +345,7 @@ pub fn _strftime(
     // pad for null?
     let bytes = result_str.chars().count();
     if bytes as u32 > maxsize {
-        return 0;
+        0
     } else {
         // write output string
         for (i, c) in result_str.chars().enumerate() {