Server: remove headless backend

This was previously used to create a noop output, but we no longer rely
on that hack.

 river/Server.zig | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/river/Server.zig b/river/Server.zig
index 3715f1e..8cb5671 100644
--- a/river/Server.zig
+++ b/river/Server.zig
@@ -48,7 +48,6 @@ sigint_source: *wl.EventSource,
 sigterm_source: *wl.EventSource,
 
 backend: *wlr.Backend,
-headless_backend: *wlr.Backend,
 
 renderer: *wlr.Renderer,
 allocator: *wlr.Allocator,
@@ -88,10 +87,6 @@ pub fn init(self: *Self) !void {
     // This frees itself when the wl.Server is destroyed
     self.backend = try wlr.Backend.autocreate(self.wl_server);
 
-    // This backend is used to create a headless output for use when no actual
-    // outputs are available. This frees itself when the wl.Server is destroyed.
-    self.headless_backend = try wlr.Backend.createHeadless(self.wl_server);
-
     self.renderer = try wlr.Renderer.autocreate(self.backend);
     errdefer self.renderer.destroy();
     try self.renderer.initServer(self.wl_server);