Remove unused gdk::Texture import

Author: sdroege

gdk4/src/clipboard.rs

@@ -1,6 +1,6 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use crate::{Clipboard, Texture};
+use crate::Clipboard;
 use glib::object::IsA;
 use glib::translate::*;
 use glib::GString;