取消表格导出功能，修复回滚（删表）功能的painc (#1310)

* [feature]:取消表格导出功能

* 修复回滚（删表）painc的问题

* [feature]:修改初始化

server/router/example/enter.go

@@ -1,7 +1,6 @@
 package example
 
 type RouterGroup struct {
-	ExcelRouter
 	CustomerRouter
 	FileUploadAndDownloadRouter
 }

server/router/example/exa_excel.go

@@ -1,19 +0,0 @@
-package example
-
-import (
-	v1 "github.com/flipped-aurora/gin-vue-admin/server/api/v1"
-	"github.com/gin-gonic/gin"
-)
-
-type ExcelRouter struct{}
-
-func (e *ExcelRouter) InitExcelRouter(Router *gin.RouterGroup) {
-	excelRouter := Router.Group("excel")
-	exaExcelApi := v1.ApiGroupApp.ExampleApiGroup.ExcelApi
-	{
-		excelRouter.POST("importExcel", exaExcelApi.ImportExcel)          // 导入Excel
-		excelRouter.GET("loadExcel", exaExcelApi.LoadExcel)               // 加载Excel数据
-		excelRouter.POST("exportExcel", exaExcelApi.ExportExcel)          // 导出Excel
-		excelRouter.GET("downloadTemplate", exaExcelApi.DownloadTemplate) // 下载模板文件
-	}
-}