调整 api 目录，代码优化

src/api/system/dept.js

@@ -31,11 +31,4 @@ export function edit(data) {
   })
 }
 
-export function downloadDept(params) {
-  return request({
-    url: 'api/dept/download',
-    method: 'get',
-    params,
-    responseType: 'blob'
-  })
-}
+export default { add, edit, del, getDepts }

src/api/system/menu.js

@@ -1,6 +1,5 @@
 import request from '@/utils/request'
 
-// 获取所有的菜单树
 export function getMenusTree() {
   return request({
     url: 'api/menus/tree',
@@ -38,11 +37,4 @@ export function edit(data) {
   })
 }
 
-export function downloadMenu(params) {
-  return request({
-    url: 'api/menus/download',
-    method: 'get',
-    params,
-    responseType: 'blob'
-  })
-}
+export default { add, edit, del, getMenusTree }

src/api/system/role.js

@@ -45,14 +45,6 @@ export function edit(data) {
   })
 }
 
-export function editPermission(data) {
-  return request({
-    url: 'api/roles/permission',
-    method: 'put',
-    data
-  })
-}
-
 export function editMenu(data) {
   return request({
     url: 'api/roles/menu',
@@ -61,11 +53,4 @@ export function editMenu(data) {
   })
 }
 
-export function downloadRole(params) {
-  return request({
-    url: 'api/roles/download',
-    method: 'get',
-    params,
-    responseType: 'blob'
-  })
-}
+export default { add, edit, del, get, editMenu }