在Angular Slickgrid中，要实现在按下确定按钮时删除焦点而不更改数据，可以使用onBeforeCellEditorDestroy事件来监听编辑器销毁前的操作，并在其中手动删除焦点。

下面是一个示例代码：

import { Component, OnInit } from '@angular/core';
import { AngularGridInstance, Column, FieldType, Editors, GridOption } from 'angular-slickgrid';

@Component({
  selector: 'app-my-grid',
  templateUrl: './my-grid.component.html'
})
export class MyGridComponent implements OnInit {
  title = 'Angular-Slickgrid Demo';
  gridOptions: GridOption;
  columnDefinitions: Column[];
  dataset: any[];
  angularGrid: AngularGridInstance;

  ngOnInit(): void {
    this.columnDefinitions = [
      { id: 'title', name: 'Title', field: 'title', editor: { model: Editors.text, required: true } },
      { id: 'duration', name: 'Duration', field: 'duration', editor: { model: Editors.text } },
      { id: 'finish', name: 'Finish', field: 'finish', fieldType: FieldType.dateUs, editor: { model: Editors.date } }
    ];

    this.gridOptions = {
      enableCellNavigation: true,
      enableColumnReorder: false,
      editable: true,
      autoEdit: true, // enable inline editing
      enableCheckboxSelector: true,
      checkboxSelector: {
        hideInFilterHeaderRow: false,
        hideInColumnTitleRow: true
      },
      enableRowSelection: true,
      enableAutoResize: true,
      autoResize: {
        container: '#my-grid-container'
      },
      enableAsyncPostRender: true
    };

    this.dataset = [
      { id: 1, title: 'Task 1', duration: '5 days', percentComplete: 98, start: '01/01/2009', finish: '01/05/2009', effortDriven: false },
      { id: 2, title: 'Task 2', duration: '5 days', percentComplete: 98, start: '01/01/2009', finish: '01/05/2009', effortDriven: false },
      // more data...
    ];
  }

  angularGridReady(angularGrid: AngularGridInstance) {
    this.angularGrid = angularGrid;
  }

  handleOnBeforeCellEditorDestroy(editor) {
    // remove focus from the editor
    editor.getInputElement().blur();
  }
}

在上面的代码中，我们定义了一个handleOnBeforeCellEditorDestroy方法，并将其绑定到列定义中的editor的onBeforeCellEditorDestroy事件上。在该方法中，我们通过editor.getInputElement().blur()将焦点从编辑器中移除。

在模板中，我们使用sgOnBeforeCellEditorDestroy指令将该方法与事件绑定在一起：

这样，当用户按下确定按钮时，焦点将从编辑器中移除，而不会更改数据。