Hi Sush,

Please edit that page via WPBakery Page Builder and after that edit the portfolio element, untick the option sortable and the filters will be gone.

If you want to remove only the 'All' filter but not the others, you can do that by adding the following style in Theme Options > Custom CSS.

#filters li[data-filter='*'] {
    display: none !important;
}

Kind Regards