enlightenment.{enlightenment,ephoto,rage,terminology}: use default pkgconfig

With efl-1.23.1 built with meson the native pkgconfig is not needed
anymore, and building fails with it.

pkgs/desktops/enlightenment/enlightenment.nix

@@ -17,10 +17,10 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [
-    (pkgconfig.override { vanilla = true; })
     gettext
     meson
     ninja
+    pkgconfig
   ];
 
   buildInputs = [

pkgs/desktops/enlightenment/ephoto.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [
-    (pkgconfig.override { vanilla = true; })
+    pkgconfig
     mesa.dev # otherwise pkg-config does not find gbm
     makeWrapper
   ];

pkgs/desktops/enlightenment/rage.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     meson
     ninja
-    (pkgconfig.override { vanilla = true; })
+    pkgconfig
     mesa.dev
     wrapGAppsHook
   ];

pkgs/desktops/enlightenment/terminology.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     meson
     ninja
-    (pkgconfig.override { vanilla = true; })
+    pkgconfig
     makeWrapper
   ];