remove search-input from Form

CHANGELOG.md

@@ -24,7 +24,7 @@ timeline: true
 - Modal
   - 修复弹出时背景依然跟随滚动的问题。[#1751](https://github.com/ant-design/ant-design/issues/1751)
   - 修复关闭按钮获得焦点时的样式问题。[#1668](https://github.com/ant-design/ant-design/issues/1668)
-- 修复 Form 搜索输入框样式问题。[7b7f846](https://github.com/ant-design/ant-design/commit/7b7f8461611e53f4f96ae8d64d37fe28ee8d2553)
+- 将搜索输入框相关样式移到 Input 组件下。[7b7f846](https://github.com/ant-design/ant-design/commit/7b7f8461611e53f4f96ae8d64d37fe28ee8d2553)
 - 修复 Select 获得焦点时的样式问题。[#1684](https://github.com/ant-design/ant-design/issues/1684)
 - 修复 TreeSelect 占位符样式问题。[#1657](https://github.com/ant-design/ant-design/issues/1657)
 - 修复了类型定义以更好地支持 `TypeScript`。[#1696](https://github.com/ant-design/ant-design/pull/1696) [@xujihui1985](https://github.com/xujihui1985)

components/form/style/index.less

@@ -201,40 +201,6 @@ form {
   }
 }
 
-.ant-search-input-wrapper {
-  display: inline-block;
-  vertical-align: middle;
-}
-
-.ant-search-input {
-  &.ant-input-group .ant-input:first-child {
-    border-radius: @border-radius-base;
-    position: absolute;
-    top: -1px;
-  }
-  .ant-search-btn {
-    .btn-default;
-    border-radius: 0 @border-radius-base - 1 @border-radius-base - 1 0;
-    left: -1px;
-    position: relative;
-    border-width: 0 0 0 1px;
-    z-index: 2;
-    padding-left: 8px;
-    padding-right: 8px;
-    &:hover {
-      border-color: @border-color-base;
-    }
-    form & {
-      padding-top: 6px;
-      padding-bottom: 6px;
-    }
-  }
-  &&-focus .ant-search-btn-noempty,
-  &:hover .ant-search-btn-noempty {
-    .btn-primary;
-  }
-}
-
 // Form layout
 //== Horizontal Form
 .@{form-prefix-cls}-horizontal {