gst_all_1.gst-plugins-rs: drop the raptorq test everywhere

I don't understand this, and it didn't seem anyone was willing
to look into the issue.
https://hydra.nixos.org/build/225312469/nixlog/1/tail

pkgs/development/libraries/gstreamer/rs/default.nix

@@ -138,7 +138,7 @@ stdenv.mkDerivation rec {
     '';
   };
 
-  postPatch = lib.optionalString stdenv.hostPlatform.isAarch64 ''
+  postPatch = ''
     rm net/raptorq/tests/raptorq.rs
   '';