pkg/macos: animation yeet usingns

pkg/macos/animation.zig

@@ -1,5 +1,7 @@
-pub const c = @import("animation/c.zig");
-pub usingnamespace @import("animation/layer.zig");
+pub const c = @import("animation/c.zig").c;
+
+/// https://developer.apple.com/documentation/quartzcore/calayer/contents_gravity_values?language=objc
+pub extern "c" const kCAGravityTopLeft: *anyopaque;
 
 test {
     @import("std").testing.refAllDecls(@This());

pkg/macos/animation/c.zig

@@ -1,3 +1,3 @@
-pub usingnamespace @cImport({
+pub const c = @cImport({
     @cInclude("QuartzCore/CALayer.h");
 });

pkg/macos/animation/layer.zig

@@ -1,2 +0,0 @@
-/// https://developer.apple.com/documentation/quartzcore/calayer/contents_gravity_values?language=objc
-pub extern "c" const kCAGravityTopLeft: *anyopaque;