diff --git a/src/macos/window.rs b/src/macos/window.rs
index d84de7c..30a9016 100644
--- a/src/macos/window.rs
+++ b/src/macos/window.rs
@@ -166,44 +166,6 @@ impl Window {
         window_handle
     }
 
-    pub fn open_as_if_parented<H, B>(options: WindowOpenOptions, build: B) -> WindowHandle
-    where
-        H: WindowHandler + 'static,
-        B: FnOnce(&mut crate::Window) -> H,
-        B: Send + 'static,
-    {
-        let pool = unsafe { NSAutoreleasePool::new(nil) };
-
-        let scaling = match options.scale {
-            WindowScalePolicy::ScaleFactor(scale) => scale,
-            WindowScalePolicy::SystemScaleFactor => 1.0,
-        };
-
-        let window_info = WindowInfo::from_logical_size(options.size, scaling);
-
-        let ns_view = unsafe { create_view(&options) };
-
-        let window = Window {
-            ns_app: None,
-            ns_window: None,
-            ns_view,
-            close_requested: false,
-
-            #[cfg(feature = "opengl")]
-            gl_context: options
-                .gl_config
-                .map(|gl_config| Self::create_gl_context(None, ns_view, gl_config)),
-        };
-
-        let window_handle = Self::init(true, window, window_info, build);
-
-        unsafe {
-            let () = msg_send![pool, drain];
-        }
-
-        window_handle
-    }
-
     pub fn open_blocking<H, B>(options: WindowOpenOptions, build: B)
     where
         H: WindowHandler + 'static,
diff --git a/src/win/window.rs b/src/win/window.rs
index 9378a75..e5b6cdb 100644
--- a/src/win/window.rs
+++ b/src/win/window.rs
@@ -565,17 +565,6 @@ impl Window<'_> {
         window_handle
     }
 
-    pub fn open_as_if_parented<H, B>(options: WindowOpenOptions, build: B) -> WindowHandle
-    where
-        H: WindowHandler + 'static,
-        B: FnOnce(&mut crate::Window) -> H,
-        B: Send + 'static,
-    {
-        let (window_handle, _) = Self::open(true, null_mut(), options, build);
-
-        window_handle
-    }
-
     pub fn open_blocking<H, B>(options: WindowOpenOptions, build: B)
     where
         H: WindowHandler + 'static,
diff --git a/src/window.rs b/src/window.rs
index f662990..57e013d 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -87,16 +87,6 @@ impl<'a> Window<'a> {
         WindowHandle::new(window_handle)
     }
 
-    pub fn open_as_if_parented<H, B>(options: WindowOpenOptions, build: B) -> WindowHandle
-    where
-        H: WindowHandler + 'static,
-        B: FnOnce(&mut Window) -> H,
-        B: Send + 'static,
-    {
-        let window_handle = platform::Window::open_as_if_parented::<H, B>(options, build);
-        WindowHandle::new(window_handle)
-    }
-
     pub fn open_blocking<H, B>(options: WindowOpenOptions, build: B)
     where
         H: WindowHandler + 'static,
diff --git a/src/x11/window.rs b/src/x11/window.rs
index 00e0153..4d85fe9 100644
--- a/src/x11/window.rs
+++ b/src/x11/window.rs
@@ -147,26 +147,6 @@ impl Window {
         window_handle
     }
 
-    pub fn open_as_if_parented<H, B>(options: WindowOpenOptions, build: B) -> WindowHandle
-    where
-        H: WindowHandler + 'static,
-        B: FnOnce(&mut crate::Window) -> H,
-        B: Send + 'static,
-    {
-        let (tx, rx) = mpsc::sync_channel::<WindowOpenResult>(1);
-
-        let (parent_handle, mut window_handle) = ParentHandle::new();
-
-        thread::spawn(move || {
-            Self::window_thread(None, options, build, tx.clone(), Some(parent_handle));
-        });
-
-        let raw_window_handle = rx.recv().unwrap().unwrap();
-        window_handle.raw_window_handle = Some(raw_window_handle.0);
-
-        window_handle
-    }
-
     pub fn open_blocking<H, B>(options: WindowOpenOptions, build: B)
     where
         H: WindowHandler + 'static,