Remove IE11's "clear field" X button on Windows 8

Following the advice given in Remove IE10's "clear field" X button on certain inputs?

.someinput::-ms-clear {
    display: none;
}  

worked great with IE 11 on Windows 7 but not with IE 11 on Windows 8.1

I also tried

.someinput::-ms-clear {
    height: 0;
    width: 0;
} 

Any thoughts on removing the X on IE 11/Windows 8.1? Thanks