Add support for primitive arrays in remove function

**Is your feature request related to a problem? Please describe.**

The filter function does not support filtering primitive arrays like below
remove(["foo", "bar", "foobar"], length(it)==3)

This is mainly because it does not support `it` reference

**Describe the solution you'd like**

Add support for `it` operator in remove function, so that it supports a primitive array

The issue names the remove function, filter behavior, primitive arrays, and the it reference but no files or tests. Start by locating the remove implementation and existing tests for filter or it; done means remove accepts the shown primitive-array expression and its behavior is covered by a test.

Written by the indexing model from the issue text.