Do not define invalid typehints for ClojureScript

ClojureScript now recognize typehints and will issue some warnings when encountering invalid ones.

```
WARNING: cljs.core/==, all arguments must be numbers, got [long number] instead. at line 15 /Users/julien/Documents/Projects/refugio-ui/target/cljsbuild-compiler-1/hickory/hiccup_utils.cljs
...
```

I removed `^long` typehints from ClojureScript codebase as they are irrelevant in JavaScript.