Remove Metal dependency on macOS (#1003)

CHANGELOG.md

@@ -8,6 +8,7 @@ and `WindowEvent::HoveredFile`.
 - Revert the use of invisible surfaces in Wayland, which introduced graphical glitches with OpenGL (#835)
 - On X11, implement `_NET_WM_PING` to allow desktop environment to kill unresponsive programs.
 - On Windows, when a window is initially invisible, it won't take focus from the existing visible windows.
+- On macOS, drop unused Metal dependency.
 
 # 0.20.0 Alpha 1
 

Cargo.toml

@@ -35,10 +35,14 @@ objc = "0.2.3"
 cocoa = "0.18.4"
 core-foundation = "0.6"
 core-graphics = "0.17.3"
-core-video-sys = "0.1.2"
 dispatch = "0.1.4"
 objc = "0.2.3"
 
+[target.'cfg(target_os = "macos")'.dependencies.core-video-sys]
+version = "0.1.3"
+default_features = false
+features = ["display_link"]
+
 [target.'cfg(target_os = "windows")'.dependencies]
 bitflags = "1"