lint: Drop extra ignored nodes in legacy config

They didn't just allow for the style patterns they were added to,
but allowed for some messed up indentation to slip through. Now
that we adapted the code to not use the old style, it's time to
drop the exceptions.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/725

lint/eslintrc-legacy.json

@@ -5,8 +5,6 @@
             4,
             {
                 "ignoredNodes": [
-                    "ConditionalExpression",
-                    "CallExpression > ArrowFunctionExpression",
                     "CallExpression[callee.object.name=GObject][callee.property.name=registerClass] > ClassExpression:first-child"
                 ],
                 "CallExpression": { "arguments": "first" },