eccodes: 2.9.2 -> 2.10.0

Python3 is now officially supported as "beta", see relase notes at:
https://confluence.ecmwf.int/display/ECC/ecCodes+version+2.10.0+released

pkgs/top-level/python-packages.nix

@@ -1613,11 +1613,10 @@ in {
 
   easy-thumbnails = callPackage ../development/python-modules/easy-thumbnails { };
 
-  eccodes = disabledIf (!isPy27)
-    (toPythonModule (pkgs.eccodes.override {
-      enablePython = true;
-      pythonPackages = self;
-    }));
+  eccodes = toPythonModule (pkgs.eccodes.override {
+    enablePython = true;
+    pythonPackages = self;
+  });
 
   EditorConfig = callPackage ../development/python-modules/editorconfig { };