message: Delete unnecessary styles in check-item  block
diff: .sv-check-item:checked {
  opacity: 1;
  }
  -.sv-check-item:after {
  - display: none;
  - left: 50%;
  - margin-right: -50%;
  - position: absolute;
  - top: 50%;
  - transform: translate(-50%, -50%);
  -}
  -.sv-check-item:checked:after,
  -.sv-check-item:hover:after {
  - display: inline-block;
  -}
  .sv-check-item:focus {
  box-shadow: 0 0 0 0.21em white,
  0 0 0 0.28em#19ab8d;
  