temporary: Drop workarounds for previous upstream version

temporary/all-packages.nix

@@ -17,11 +17,6 @@ self: super: pkgs: with pkgs; {
     ];
   } );
 
-  # https://github.com/NixOS/nixpkgs/issues/38459
-  octave = super.octave.overrideAttrs (attrs: {
-    buildInputs = attrs.buildInputs ++ [ gl2ps ];
-  } );
-
   # https://github.com/NixOS/nixpkgs/issues/44426
   python27 = super.python27.override { packageOverrides = pythonOverrides; };
   python35 = super.python35.override { packageOverrides = pythonOverrides; };