You can hide the un-necessary columns by following the steps as provided below -
1). Go to the Format menu and turn-off the “Word Wrap” for the “Column Headers”, “Row Headers”, if there any and for the “Values” part.
2). Now, move your mouse cursor at the top between the two columns and the cursor will get converted into the “Double - Headed Arrow”.
3). Once it gets converted into the “Double - Headed Arrow”, drag the column that you don’t want showcase into the reports from “Right to Left” and those columns will be hidden.
Hoping you find this useful and meets your requirements that you’ve been looking for.