diff-pdf: migrate to by-name

pkgs/by-name/di/diff-pdf/package.nix

@@ -7,7 +7,7 @@
   pkg-config,
   cairo,
   poppler,
-  wxGTK,
+  wxwidgets_3_2,
 }:
 
 stdenv.mkDerivation rec {
@@ -29,7 +29,7 @@ stdenv.mkDerivation rec {
   buildInputs = [
     cairo
     poppler
-    wxGTK
+    wxwidgets_3_2
   ];
 
   preConfigure = "./bootstrap";

pkgs/top-level/all-packages.nix

@@ -10232,10 +10232,6 @@ with pkgs;
 
   diffpdf = libsForQt5.callPackage ../applications/misc/diffpdf { };
 
-  diff-pdf = callPackage ../applications/misc/diff-pdf {
-    wxGTK = wxwidgets_3_2;
-  };
-
   mypaint-brushes1 = callPackage ../development/libraries/mypaint-brushes/1.0.nix { };
 
   mypaint-brushes = callPackage ../development/libraries/mypaint-brushes { };