diff --git a/package.json b/package.json
index 47e0273655..f3fd982054 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,6 @@
     "rc-tooltip": "~3.3.2",
     "rc-tree": "~1.3.0",
     "rc-tree-select": "~1.5.0",
-    "rc-trigger": "~1.4.0",
     "rc-upload": "~1.10.0",
     "rc-util": "~3.1.2",
     "react-slick": "~0.12.0",
diff --git a/style/components/collapse.less b/style/components/collapse.less
index e1947416b4..5fe863fabf 100644
--- a/style/components/collapse.less
+++ b/style/components/collapse.less
@@ -12,10 +12,6 @@
   border-radius: 3px;
   border: 1px solid @border-color-base;
 
-  &-anim-active {
-    transition: height .2s ease-out;
-  }
-
   & > &-item {
     border-top: 1px solid @border-color-base;
     &:first-child {