update button plain

src/modules/print/view/ExamStructure.vue

@@ -99,7 +99,6 @@
                 icon="el-icon-delete"
                 @click="removeStructure(scope.row)"
                 :disabled="!hasPermit"
-                plain
                 >删除
               </el-button>
             </template>

src/modules/print/view/ProjectStatistic.vue

@@ -139,7 +139,6 @@
                 v-if="scope.row.btnType == 'OTHER'"
                 @click="removeOtherSetting(scope.row)"
                 :disabled="!hasPermit"
-                plain
                 >删除
               </el-button>
             </template>