Migrated tests to jest

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

test/remove/remove.js

@@ -1,8 +0,0 @@
-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;