fix(cdk/tree): remove useless properties and functions

Author: WwwHhhYran

src/components-examples/cdk/tree/cdk-tree-custom-key-manager/cdk-tree-custom-key-manager-example.html

@@ -1,8 +1,6 @@
 <cdk-tree [dataSource]="dataSource" [treeControl]="treeControl">
   <!-- This is the tree node template for leaf nodes -->
   <cdk-tree-node *cdkTreeNodeDef="let node" cdkTreeNodePadding
-                 [style.display]="shouldRender(node) ? 'flex' : 'none'"
-                 [isDisabled]="!shouldRender(node)"
                  class="example-tree-node">
     <!-- use a disabled button to provide padding for tree leaf -->
     <button matIconButton disabled></button>
@@ -12,8 +10,6 @@
   <cdk-tree-node *cdkTreeNodeDef="let node; when: hasChild" cdkTreeNodePadding
                  cdkTreeNodeToggle
                  [cdkTreeNodeTypeaheadLabel]="node.name"
-                 [style.display]="shouldRender(node) ? 'flex' : 'none'"
-                 [isDisabled]="!shouldRender(node)"
                  (expandedChange)="node.isExpanded = $event"
                  class="example-tree-node"
                  tabindex="0">

src/components-examples/cdk/tree/cdk-tree-custom-key-manager/cdk-tree-custom-key-manager-example.ts

@@ -336,17 +336,6 @@ export class CdkTreeCustomKeyManagerExample {
 
     return null;
   }
-
-  shouldRender(node: ExampleFlatNode) {
-    let parent = this.getParentNode(node);
-    while (parent) {
-      if (!parent.isExpanded) {
-        return false;
-      }
-      parent = this.getParentNode(parent);
-    }
-    return true;
-  }
 }
 
 const EXAMPLE_DATA: ExampleFlatNode[] = [

src/components-examples/cdk/tree/cdk-tree-flat-children-accessor/cdk-tree-flat-children-accessor-example.ts

@@ -55,17 +55,6 @@ export class CdkTreeFlatChildrenAccessorExample {
 
     return null;
   }
-
-  shouldRender(node: NestedFoodNode) {
-    let parent = this.getParentNode(node);
-    while (parent) {
-      if (!this.tree.isExpanded(parent)) {
-        return false;
-      }
-      parent = this.getParentNode(parent);
-    }
-    return true;
-  }
 }
 
 const EXAMPLE_DATA: NestedFoodNode[] = [

src/components-examples/cdk/tree/cdk-tree-flat-level-accessor/cdk-tree-flat-level-accessor-example.ts

@@ -45,12 +45,6 @@ export class CdkTreeFlatLevelAccessorExample {
 
     return null;
   }
-
-  shouldRender(node: FlatFoodNode): boolean {
-    // This node should render if it is a root node or if all of its ancestors are expanded.
-    const parent = this.getParentNode(node);
-    return !parent || (!!this.tree?.isExpanded(parent) && this.shouldRender(parent));
-  }
 }
 
 const EXAMPLE_DATA: FlatFoodNode[] = [

src/components-examples/cdk/tree/cdk-tree-flat/cdk-tree-flat-example.ts

@@ -43,17 +43,6 @@ export class CdkTreeFlatExample {
 
     return null;
   }
-
-  shouldRender(node: ExampleFlatNode) {
-    let parent = this.getParentNode(node);
-    while (parent) {
-      if (!parent.isExpanded) {
-        return false;
-      }
-      parent = this.getParentNode(parent);
-    }
-    return true;
-  }
 }
 
 const EXAMPLE_DATA: ExampleFlatNode[] = [

src/components-examples/cdk/tree/cdk-tree-nested-children-accessor/cdk-tree-nested-children-accessor-example.ts

@@ -52,12 +52,6 @@ export class CdkTreeNestedChildrenAccessorExample {
 
     return null;
   }
-
-  shouldRender(node: NestedFoodNode): boolean {
-    // This node should render if it is a root node or if all of its ancestors are expanded.
-    const parent = this.getParentNode(node);
-    return !parent || (!!this.tree?.isExpanded(parent) && this.shouldRender(parent));
-  }
 }
 
 const EXAMPLE_DATA: NestedFoodNode[] = [

src/components-examples/cdk/tree/cdk-tree-nested-level-accessor/cdk-tree-nested-level-accessor-example.ts

@@ -44,12 +44,6 @@ export class CdkTreeNestedLevelAccessorExample {
 
     return null;
   }
-
-  shouldRender(node: FlatFoodNode): boolean {
-    // This node should render if it is a root node or if all of its ancestors are expanded.
-    const parent = this.getParentNode(node);
-    return !parent || (!!this.tree?.isExpanded(parent) && this.shouldRender(parent));
-  }
 }
 
 const EXAMPLE_DATA: FlatFoodNode[] = [