Please follow the steps below to delete a column:
Step 1: Click any cell in the column that you want to delete;
Step 2: Right-click, and select "Delete" from the dialog box;
Step 3: In the "Delete" dialog box, click "Entire column";
Step 4: Click "OK" at the bottom.
Alternatively, please use commands in the ribbon:
Step 1: Click any cell in the column that you want to delete;
Step 2: Click the "Home" Tab from the ribbon;
Step 3: Click "Delete" in the Cells area, and select "Delete Sheet Columns".