Fix Error name collision in dummy platform

src/platform/dummy.rs

@@ -1,22 +1,24 @@
 use crate::ClipboardProvider;
 
 use raw_window_handle::HasRawWindowHandle;
-use std::error::Error;
 
 struct Dummy;
 
 pub fn connect<W: HasRawWindowHandle>(
     _window: &W,
-) -> Result<Box<dyn ClipboardProvider>, Box<dyn Error>> {
+) -> Result<Box<dyn ClipboardProvider>, Box<dyn std::error::Error>> {
     Ok(Dummy)
 }
 
 impl ClipboardProvider for Dummy {
-    fn read(&self) -> Result<String, Box<dyn Error>> {
+    fn read(&self) -> Result<String, Box<dyn std::error::Error>> {
         Err(Error::Unimplemented)
     }
 
-    fn write(&mut self, contents: String) -> Result<(), Box<dyn Error>> {
+    fn write(
+        &mut self,
+        contents: String,
+    ) -> Result<(), Box<dyn std::error::Error>> {
         Err(Error::Unimplemented)
     }
 }