fix 微信文本内容校验

ruoyi-admin/src/main/java/com/ruoyi/web/controller/banner/BannerController.java

@@ -6,8 +6,6 @@ import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.PutMapping;
-import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;