refactor(NodeReference): remove pin and unpin methods;

Author: Myestery

browser_tests/fixtures/utils/litegraphUtils.ts

@@ -351,20 +351,6 @@ export class NodeReference {
   async isCollapsed() {
     return !!(await this.getFlags()).collapsed
   }
-  async pin() {
-    await this.comfyPage.page.evaluate((id) => {
-      const node = window['app'].canvas.graph.getNodeById(id)
-      if (!node) throw new Error('Node not found')
-      node.pin(true)
-    }, this.id)
-  }
-  async unpin() {
-    await this.comfyPage.page.evaluate((id) => {
-      const node = window['app'].canvas.graph.getNodeById(id)
-      if (!node) throw new Error('Node not found')
-      node.unpin()
-    }, this.id)
-  }
   async isBypassed() {
     return (await this.getProperty<number | null | undefined>('mode')) === 4
   }