octavePackages.octproj: unmark as broken

This package broke when Octave went to version 7.1.
nixpkgs commit 8399907be3 fixed this.

Octave's 7.2 release built the fix into Octave itself, so this is also
a non-issue now.

pkgs/development/octave-modules/octproj/default.nix

@@ -30,6 +30,5 @@ buildOctavePackage rec {
     license = licenses.gpl3Plus;
     maintainers = with maintainers; [ KarlJoad ];
     description = "GNU Octave bindings to PROJ library for cartographic projections and CRS transformations";
-    broken = true; # error: unlink: operation failed: No such file or directory
   };
 }