Cleanup the entity remover and increase readability

[TheMeinerLP]

Overview

This pr improves the readability of the entity remover and removes some potential memory issue

Description

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1. Make sure you are opening from a topic branch (**/feature/fix/docs/ branch** (right side)) and not your main branch.

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3. New public fields and methods are annotated with `@since TODO`.

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[dordsor21]

PR would be better suited for upstream tbh

[TheMeinerLP]

@dordsor21 I know that, but last time I was put down a bit to improve code. Since then I've had an aversion to them.
But feel free to copy the idea and pitch it to them. Please understand my decision