Update utils.ts

[christiantakle]

Remove redundant spread processKeysInObj.

Description

Avoid unnecessary memory allocation.

Testing

Filter is already returning a shallow copy of the array see:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter#return_value
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_syntax#copying_an_array

Additional context

Found this allocation when looking for a memory leak using chrome developer tools (allocation sampling). Other places in the file correctly uses obj.filter

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