A family of Microsoft word processing software products for creating web, email, and print documents.
In Word for Windows, you should see the Eraser in the Draw group on the (Table) Layout tab on the far right. The insertion point must be inside a table.
You can always add the command to the Quick Access Toolbar, if you wish. Click File > Options > Quick Access Toolbar. Set the "Choose commands from" drop down to "All Commands." Locate Eraser [Table Eraser], click to select it and then click the Add button. Confirm with OK.