kdeFrameworks: remove redundant maintainer lists

I am automatically a maintainer of all packages in the set, so there is not
reason to mention me explicitly as the maintainer of every individual package.

pkgs/development/libraries/kde-frameworks/kjobwidgets.nix

@@ -1,12 +1,11 @@
 {
-  mkDerivation, lib,
+  mkDerivation,
   extra-cmake-modules, qttools,
   kcoreaddons, kwidgetsaddons, qtx11extras
 }:
 
 mkDerivation {
   name = "kjobwidgets";
-  meta = { maintainers = [ lib.maintainers.ttuegel ]; };
   nativeBuildInputs = [ extra-cmake-modules qttools ];
   buildInputs = [ kcoreaddons kwidgetsaddons qtx11extras ];
 }