Remove clipboard_windows and simplify modules

src/platform/ios.rs

@@ -0,0 +1,38 @@
+use crate::ClipboardProvider;
+
+use raw_window_handle::HasRawWindowHandle;
+use std::error::Error;
+
+pub fn new_clipboard<W: HasRawWindowHandle>(
+    _window: &W,
+) -> Result<Box<dyn ClipboardProvider>, Box<dyn Error>> {
+    Ok(Box::new(clipboard_ios::Clipboard::new()?))
+}
+
+pub struct Clipboard;
+
+impl Clipboard {
+    pub fn new() -> Result<Clipboard, Box<dyn Error>> {
+        Ok(Self)
+    }
+}
+
+#[derive(Debug)]
+#[allow(non_camel_case_types)]
+pub enum iOSClipboardError {
+    Unimplemented,
+}
+
+impl std::fmt::Display for iOSClipboardError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "Unimplemented")
+    }
+}
+
+impl Error for iOSClipboardError {}
+
+impl ClipboardProvider for clipboard_ios::Clipboard {
+    fn read(&self) -> Result<String, Box<dyn Error>> {
+        Err(Box::new(clipboard_ios::iOSClipboardError::Unimplemented))
+    }
+}