Remove .caret rule font-size-base - 1 because it will no longer be needed once…

Remove .caret rule font-size-base - 1 because it will no longer be needed once variable @font-size-base is reduced by 1px

dist/less/_ui-select.less

@@ -56,7 +56,6 @@ body > .ui-select-bootstrap.open {
     width: 100%;
   }
   .ui-select-toggle > .caret {
-    font-size: (@font-size-base - 1);
     font-style: normal;
     right: 6px;
     top: 10px;

dist/origin-web-common.css

@@ -525,7 +525,6 @@ body > .ui-select-bootstrap.open {
   width: 100%;
 }
 .ui-select-bootstrap .ui-select-toggle > .caret {
-  font-size: 11px;
   font-style: normal;
   right: 6px;
   top: 10px;

src/styles/_ui-select.less

@@ -56,7 +56,6 @@ body > .ui-select-bootstrap.open {
     width: 100%;
   }
   .ui-select-toggle > .caret {
-    font-size: (@font-size-base - 1);
     font-style: normal;
     right: 6px;
     top: 10px;