input time without am pm

.without_ampm::-webkit-datetime-edit-ampm-field {
   display: none;
 }
 input[type=time]::-webkit-clear-button {
   -webkit-appearance: none;
   -moz-appearance: none;
   -o-appearance: none;
   -ms-appearance:none;
   appearance: none;
   margin: -10px; 
 }