Revert "kde/plasma: apply hacks to fix build"

This reverts commit 35f59cc7a5.

pkgs/kde/plasma/breeze-gtk/default.nix

@@ -10,10 +10,5 @@ mkKdeDerivation {
   # FIXME(later): upstream
   patches = [./0001-fix-add-executable-bit.patch];
 
-  # FIXME: hack to fix build, remove for 6.0.2
-  postPatch = ''
-    substituteInPlace CMakeLists.txt --replace-fail "ECM 6.0.1" "ECM 6.0.0"
-  '';
-
   extraNativeBuildInputs = [sass python3 python3Packages.pycairo];
 }

pkgs/kde/plasma/breeze-plymouth/default.nix

@@ -41,9 +41,6 @@ in
       postPatch =
         ''
           substituteInPlace cmake/FindPlymouth.cmake --subst-var out
-
-          # FIXME: hack to fix build, remove for 6.0.2
-          substituteInPlace CMakeLists.txt --replace-fail "ECM 6.0.1" "ECM 6.0.0"
         ''
         + lib.optionalString (logoFile != null) ''
           cp ${logoFile} breeze/images/${resolvedLogoName}.logo.png

pkgs/kde/plasma/kpipewire/default.nix

@@ -1,6 +1,5 @@
 {
   mkKdeDerivation,
-  fetchpatch,
   qtquick3d,
   pkg-config,
   pipewire,
@@ -11,14 +10,6 @@
 mkKdeDerivation {
   pname = "kpipewire";
 
-  # FIXME: backport to fix build, remove for 6.0.2
-  patches = [
-    (fetchpatch {
-      url = "https://invent.kde.org/plasma/kpipewire/-/commit/df052bfa3c66d24109f40f18266ee057d1838b9b.patch";
-      hash = "sha256-69ftUUz5cvG/CmCw3hHFeU8XKhZPJjnx1raJCCay38g=";
-    })
-  ];
-
   extraNativeBuildInputs = [pkg-config];
   extraBuildInputs = [qtquick3d pipewire ffmpeg mesa libva];
 }