haskellPackages.pdftotext: use existing poppler-cpp input

This is correctly added to libraryPkgconfigDepends where it needs to go.
We could drop this in the future if we add a corresponding mapping to
cabal2nix.

pkgs/development/haskell-modules/configuration-common.nix

@@ -2944,7 +2944,7 @@ with haskellLib;
       substituteInPlace pdftotext.cabal --replace-quiet BSD3 BSD-3-Clause
     ''
     + (drv.postPatch or "");
-  }) (addExtraLibrary pkgs.pkg-config (addExtraLibrary pkgs.poppler super.pdftotext));
+  }) (super.pdftotext.override { poppler-cpp = pkgs.poppler; });
 
   # QuickCheck <2.15
   # https://github.com/google/proto-lens/issues/403