i can't remove scrollbars in html code example

Example 1: remove scrollbar css

/* Hide scrollbar for Chrome, Safari and Opera */
.example::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE and Edge */
.example {
  -ms-overflow-style: none;
}

Example 2: css remove scrollbars

overflow-y: hidden; /* Hide vertical scrollbar */
  overflow-x: hidden; /* Hide horizontal scrollbar */