Revert "feat(cssVar): add new CSS variables for font size and tooltip positioning"

This reverts commit 59e9a32ecb.

packages/artplayer/src/style/notice.less

@@ -9,7 +9,7 @@
 
         .art-notice-inner {
             display: inline-flex;
-            padding: var(--art-space-xxs);
+            padding: 5px;
             line-height: 1;
             border-radius: var(--art-border-radius);
             background-color: var(--art-tip-background);
@@ -21,4 +21,4 @@
             display: flex;
         }
     }
-}
+}