Original Data

[
    {
        "year": 1990,
        "amount": 4
    },
    {
        "year": 1991,
        "amount": 2
    },
    {
        "year": 1992,
        "amount": 6
    }
]

Remove Object from Array

[
    {
        "year": 1990,
        "amount": 4
    },
    {
        "year": 1992,
        "amount": 6
    }
]

Uncaught TypeError: Cannot read property '1' of undefined