Remove redundant null-check from Instructions.jsx
Remove redundant null-check from Instructions.jsx

We already return 'null' if 'instructions' is falsey, so no need to
do it in JSX too.

outoftime/learnpad,jwang1919/popcode,popcodeorg/popcode,popcodeorg/popcode,popcodeorg/popcode,jwang1919/popcode,popcodeorg/popcode,jwang1919/popcode,outoftime/learnpad,jwang1919/popcode