[完善]去除冗杂代码

src/app/ui/collection-tools/examinationQuestions.html

@@ -2,9 +2,9 @@
   <div style="text-align: center;font-weight: 550;">消防设施考题设定</div>
   <div style="max-height: 300px;overflow-y: auto; margin: 25px 0;">
     <!-- 消防列表树 -->
-    <mat-tree [dataSource]="dataSource" [treeControl]="treeControl" cdkDropList [cdkDropListData]="dataSource">
+    <mat-tree [dataSource]="dataSource" [treeControl]="treeControl">
 
-      <mat-tree-node cdkDrag cdkDragDisabled="false" [ngClass]="{'isLookPattern': !node.isLookPattern}" *matTreeNodeDef="let node;" matTreeNodePadding cdkTreeNodePaddingIndent='26' class="treeNode">
+      <mat-tree-node [ngClass]="{'isLookPattern': !node.isLookPattern}" *matTreeNodeDef="let node;" matTreeNodePadding cdkTreeNodePaddingIndent='26' class="treeNode">
         <button mat-icon-button disabled></button>
         <span title="{{node.name}}" [ngClass]="{'treeText': !node.isTemplate}">
           {{node.name}}      
@@ -13,7 +13,7 @@
         <mat-checkbox style="margin-left: auto;" color=primary></mat-checkbox>
       </mat-tree-node>
 
-      <mat-tree-node cdkDrag cdkDragDisabled="false" [ngClass]="{'isLookPattern': !node.isLookPattern}" *matTreeNodeDef="let node;when: hasChild" matTreeNodePadding class="treeNode" >
+      <mat-tree-node [ngClass]="{'isLookPattern': !node.isLookPattern}" *matTreeNodeDef="let node;when: hasChild" matTreeNodePadding class="treeNode" >
         <button mat-icon-button matTreeNodeToggle [attr.aria-label]="'toggle ' + node.name">
           <mat-icon class="mat-icon-rtl-mirror">
             {{treeControl.isExpanded(node) ? 'expand_more' : 'chevron_right'}}