slint-lsp: remove obsolete libXrandr input

libXrandr has not been required since winit 0.30.0[1] (slint-lsp 1.7.0).

Tested that previews still work on X11.

[1]: rust-windowing/winit@bb9b629

Author: alyssais

pkgs/by-name/sl/slint-lsp/package.nix

@@ -20,7 +20,7 @@
 }:
 
 let
-  rpathLibs = [ fontconfig libGL xorg.libxcb xorg.libX11 xorg.libXcursor xorg.libXrandr xorg.libXi ]
+  rpathLibs = [ fontconfig libGL xorg.libxcb xorg.libX11 xorg.libXcursor xorg.libXi ]
     ++ lib.optionals stdenv.hostPlatform.isLinux [ libxkbcommon wayland ];
 in
 rustPlatform.buildRustPackage rec {