A family of Microsoft word processing software products for creating web, email, and print documents.
Select the whole table. Go to the Table Layout ribbon (which appears only when a table is selected). Click the Convert to Text button at the far right. In the dialog that opens, select the character you want to use in place of the column boundaries.
Another way is to use the Paste Options. Cut the entire table and paste it back in. There will be a small tag to the right of the pasted table with the paste icon and the label "(Ctrl)". Either press the Ctrl key or click the tag to open its menu, and click the Text Only icon (the one with an A):
The table structure will be removed and the text will be retained. You may have to rearrange some of the text, depending on how the table's columns were converted; that can usually be done with the Replace dialog (e.g., replace tabs with paragraph marks).