photoflare: fix warnings

- set license to gpl3Plus
- remove unnecessary `enableParallelBuilding` parameter

pkgs/applications/graphics/photoflare/default.nix

@@ -19,13 +19,11 @@ mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = "-I${graphicsmagick}/include/GraphicsMagick";
 
-  enableParallelBuilding = true;
-
   meta = with lib; {
     description = "A cross-platform image editor with a powerful features and a very friendly graphical user interface";
     homepage = "https://photoflare.io";
     maintainers = [ maintainers.omgbebebe ];
-    license = licenses.gpl3;
+    license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };
 }