Wayland: double click (#9608)

This PR builds off of an earlier version of
https://github.com/zed-industries/zed/pull/9595, rearranges some of the
logic, and removes an unused platform API.

Release Notes:

- N/A

---------

Co-authored-by: apricotbucket28 <agustin.nicolas.marcos@outlook.com>

crates/gpui/src/platform/mac/platform.rs

@@ -48,7 +48,6 @@ use std::{
     rc::Rc,
     slice, str,
     sync::Arc,
-    time::Duration,
 };
 use time::UtcOffset;
 
@@ -715,13 +714,6 @@ impl Platform for MacPlatform {
         "macOS"
     }
 
-    fn double_click_interval(&self) -> Duration {
-        unsafe {
-            let double_click_interval: f64 = msg_send![class!(NSEvent), doubleClickInterval];
-            Duration::from_secs_f64(double_click_interval)
-        }
-    }
-
     fn os_version(&self) -> Result<SemanticVersion> {
         unsafe {
             let process_info = NSProcessInfo::processInfo(nil);