remove-unused-identifier codefix-all fails to remove ++

[sandersn]

Code

function h() {
    let y = 1
    y++
}

Expected behavior:

function h() {
}

OR

function h() {
    let y = 1
    y++
}

Actual behavior:

function h() {
    y++
}

The first is probably preferable because codefix-all removes both lines for this similar example:

function h() {
    let y = 1
    y = 2
}