remove unused ant-select-show-search className, close #4859

components/locale-provider/__tests__/__snapshots__/demo.test.js.snap

@@ -126,7 +126,7 @@ exports[`test renders ./components/locale-provider/demo/all.md correctly 1`] = `
     <div
       class="example">
       <div
-        class="ant-select-show-search ant-select ant-select-enabled"
+        class="ant-select ant-select-enabled"
         style="width:200px;">
         <div
           aria-autocomplete="list"

components/select/__tests__/__snapshots__/demo.test.js.snap

@@ -323,7 +323,7 @@ exports[`test renders ./components/select/demo/optgroup.md correctly 1`] = `
 
 exports[`test renders ./components/select/demo/search.md correctly 1`] = `
 <div
-  class="ant-select-show-search ant-select ant-select-enabled"
+  class="ant-select ant-select-enabled"
   style="width:200px;">
   <div
     aria-autocomplete="list"

components/select/demo/optgroup.md

@@ -1,6 +1,6 @@
 ---
 order: 5
-title: 
+title:
   zh-CN: 分组
   en-US: Option Group
 ---
@@ -23,9 +23,9 @@ function handleChange(value) {
 }
 
 ReactDOM.render(
-  <Select defaultValue="lucy"
+  <Select
+    defaultValue="lucy"
     style={{ width: 200 }}
-    showSearch={false}
     onChange={handleChange}
   >
     <OptGroup label="Manager">

components/select/index.tsx

@@ -92,7 +92,6 @@ export default class Select extends React.Component<SelectProps, any> {
       className = '',
       size,
       combobox,
-      showSearch,
     } = this.props;
 
     let { notFoundContent = 'Not Found', optionLabelProp } = this.props;
@@ -100,7 +99,6 @@ export default class Select extends React.Component<SelectProps, any> {
     const cls = classNames({
       [`${prefixCls}-lg`]: size === 'large',
       [`${prefixCls}-sm`]: size === 'small',
-      [`${prefixCls}-show-search`]: showSearch,
     }, className);
 
     const { antLocale } = this.context;