This function removes a list element at a specified index. The list can be in a named variable or field.
All text fields may contain any of the escape sequences described in Escape Sequences.
The list delimiter cannot be empty. If the delimiter resolves to be empty when the action is executed, nothing will be removed.
Note that where running stepwise the text fields are only processed for escape characters once based on the contents of the first file.
The index is zero based and counts from the left. ie. 0 is the first element, 1 is the second, etc. Negative indexes count from the right. ie. -1 is the last element, -2 is the second to last element, etc. If the specified index resolves to be invalid, nothing will be removed.
The action test state will be set to true if anything is removed, otherwise false.