Highcharts

The easiest way to disable title and / or subtitle in Highcharts is to provide empty (or null) title and / or subtitle text property when creating new chart e.g.

$('#container').highcharts({
    //...
    title: {
        text: '' 
        // text: null // as an alternative
    },
    subtitle: {
        text: ''
        // text: null // as an alternative
    }
    //...
    series: [ ... ]
});

No space will be created for the title and / or subtitle.

There might be some other options of hiding title or subtitle labels on this StackOverflow question.