ref(css): remove unused popover.scss

css/_popover.scss

-.popover {
-  position: absolute;
-  top: 0;
-  left: 0;
-  z-index: $popoverZ;
-  display: none;
-  max-width: 300px;
-  min-width: 100px;
-  padding: 1px;
-  text-align: left;
-  color: #333333;
-  background-color: #ffffff;
-  background-clip: padding-box;
-  border: 1px solid #cccccc;
-  border: 1px solid rgba(0, 0, 0, 0.2);
-  border-radius: 6px;
-  -webkit-box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
-  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.4);
-  white-space: normal;
-}
-.popover.top {
-  margin-top: -10px;
-}
-.popover.right {
-  margin-left: 10px;
-}
-.popover.bottom {
-  margin-top: 10px;
-}
-.popover.left {
-  margin-left: -10px;
-}
-.popover-title {
-  margin: 0;
-  padding: 8px 14px;
-  font-size: 11pt;
-  font-weight: normal;
-  line-height: 18px;
-  background-color: #f7f7f7;
-  border-bottom: 1px solid #ebebeb;
-  border-radius: 5px 5px 0 0;
-}
-.popover-content {
-  padding: 9px 14px;
-  font-size: 10pt;
-  white-space:pre-wrap;
-  text-align: center;
-}
-.popover > .arrow,
-.popover > .arrow:after {
-  position: absolute;
-  display: block;
-  width: 0;
-  height: 0;
-  border-color: transparent;
-  border-style: solid;
-}
-.popover > .arrow {
-  border-width: 11px;
-}
-.popover > .arrow:after {
-  border-width: 10px;
-  content: "";
-}
-.popover.top > .arrow {
-  left: 50%;
-  margin-left: -11px;
-  border-bottom-width: 0;
-  border-top-color: #999999;
-  border-top-color: rgba(0, 0, 0, 0.25);
-  bottom: -11px;
-}
-.popover.top > .arrow:after {
-  content: " ";
-  bottom: 1px;
-  margin-left: -10px;
-  border-bottom-width: 0;
-  border-top-color: #ffffff;
-}
-.popover.right > .arrow {
-  top: 50%;
-  left: -11px;
-  margin-top: -11px;
-  border-left-width: 0;
-  border-right-color: #999999;
-  border-right-color: rgba(0, 0, 0, 0.25);
-}
-.popover.right > .arrow:after {
-  content: " ";
-  left: 1px;
-  bottom: -10px;
-  border-left-width: 0;
-  border-right-color: #ffffff;
-}
-.popover.bottom > .arrow {
-  left: 50%;
-  margin-left: -11px;
-  border-top-width: 0;
-  border-bottom-color: #999999;
-  border-bottom-color: rgba(0, 0, 0, 0.25);
-  top: -11px;
-}
-.popover.bottom > .arrow:after {
-  content: " ";
-  top: 1px;
-  margin-left: -10px;
-  border-top-width: 0;
-  border-bottom-color: #ffffff;
-}
-.popover.left > .arrow {
-  top: 50%;
-  right: -11px;
-  margin-top: -11px;
-  border-right-width: 0;
-  border-left-color: #999999;
-  border-left-color: rgba(0, 0, 0, 0.25);
-}
-.popover.left > .arrow:after {
-  content: " ";
-  right: 1px;
-  border-right-width: 0;
-  border-left-color: #ffffff;
-  bottom: -10px;
-}

css/main.scss

 @import 'popup_menu';
 @import 'recording';
 @import 'login_menu';
-@import 'popover';
 @import 'contact_list';
 @import 'chat';
 @import 'ringing/ringing';