Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test5/remove/remove.js

@@ -0,0 +1,8 @@
+const remove = (arr, func) =>
+Array.isArray(arr)
+? arr.filter(func).reduce((acc, val) => {
+arr.splice(arr.indexOf(val), 1);
+return acc.concat(val);
+}, [])
+: [];
+module.exports = remove;