refactor(knowledge): 移除知识详情页面的冗余代码- 删除了 DocumentDrawer.vue 和 index.vue 中未使用的 knowledgePng_2 和 knowledgePng_1 图片引用

- 移除了 index.vue 中多余的 img 标签属性

src/views/knowledge/detail/components/documentDetail/DocumentDrawer.vue

@@ -60,7 +60,6 @@ import {
   segmentedModeOptionsMap
 } from '@/assets/js/utils/utilOptions'
 import RenderFile from '@/components/RenderFile/Index.vue'
-import knowledgePng_2 from '@/assets/images/konwledge/knowledge-2.png'
 import MetadataOperator from '@/views/knowledge/detail/components/metaData/MetadataOperator.vue'
 
 export default {
@@ -88,7 +87,6 @@ export default {
   },
   data() {
     return {
-      knowledgePng_2,
       localActiveSegment: this.activeSegment,
       documentSourceOptions,
       metadataDialogVisible: false

src/views/knowledge/detail/index.vue

@@ -10,10 +10,7 @@
           ></el-icon>
         </div>
 
-        <img
-          :src="knowledgeImage ? knowledgeImage : knowledgePng_1"
-          class="header-icon"
-        />
+        <img :src="knowledgeImage" class="header-icon" />
         <div class="ml10" style="flex:1">
           <div class="flex align-items-c">
             <div class="mr20 header" v-if="!editKnowledge">
@@ -278,7 +275,6 @@ import {
 } from '@/assets/js/utils/utilOptions'
 import DocumentDrawer from './components/documentDetail/DocumentDrawer.vue'
 import knowledgeForm from '@/views/knowledge/detail/components/knowledgeForm.vue'
-import knowledgePng_1 from '@/assets/images/konwledge/knowledge-1.png'
 import hitTest from '@/views/knowledge/detail/components/HitTest/Index.vue'
 import MetaData from '@/views/knowledge/detail/components/metaData/Index.vue'
 import MetadataOperator from '@/views/knowledge/detail/components/metaData/MetadataOperator.vue'
@@ -309,7 +305,6 @@ export default {
         title: '标注元数据',
         visible: false
       },
-      knowledgePng_1,
       activeName: -1,
       drawer: false,
       drawerForm: false,