JS exercises solutions - removeFromArray: Make `array` an independent parameter

[yossirise]

This spares us from having to extract array from args and is more idiomatic (I think).

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1. Because:

• A concise, idiomatic way to handle array would be to declare it as an independent parameter rather than extract it from the argument list

2. This PR:

• Moves array to the parameter list and removes code made redundant

3. Additional Information: