隐藏聊天页面返回首页按钮

src/pages/im/index.js

           <Text className="text">常见问题</Text>
         </View>
 
-        <BackHomeBtn style={{ right: '3%' }}></BackHomeBtn>
+        {/* <BackHomeBtn style={{ right: '3%' }}></BackHomeBtn> */}
         {
           visiblePrompt && (
             <View className="prompt" onClick={this.togglePromptVisible.bind(this, false)}>