fix(card): replace card-group,card-template components css-vars (#2333)

Author: shenjunjian

packages/theme/src/card-group/index.less

@@ -11,13 +11,10 @@
 */
 
 @import '../custom.less';
-@import './vars.less';
 
 @card-group-prefix-cls: ~'@{css-prefix}card-group';
 
 .@{card-group-prefix-cls} {
-  .component-css-vars-amount();
-
   width: 100%;
   display: grid;
   grid-row-gap: 16px;