gnucash: remove `with lib;`

pkgs/by-name/gn/gnucash/package.nix

···
 
   passthru.updateScript = ./update.sh;
 
-  meta = with lib; {
+  meta = {
     homepage = "https://www.gnucash.org/";
     description = "Free software for double entry accounting";
     longDescription = ''
···
       - Scheduled Transactions
       - Financial Calculations
     '';
-    license = licenses.gpl2Plus;
-    maintainers = with maintainers; [
+    license = lib.licenses.gpl2Plus;
+    maintainers = with lib.maintainers; [
       nevivurn
       ryand56
     ];
-    platforms = platforms.unix;
+    platforms = lib.platforms.unix;
     mainProgram = "gnucash";
   };
 })