Work with a copy of your workbook in case things don't go the way you expect.
Simply Select the rows to remove (you can do that by selecting the row
numbers on the left side of the worksheet) then use Edit --> Delete to
physically remove them.
Do the same for columns you don't want (select the columns by selecting
their column letters at the top of the sheet); then Edit --> Delete also.
--Select the row beneath the table. To select the row click on the row
header or press (Shift + Spacebar)
--Using Shift+Ctrl+DownArrow select all rows down
--From menu Format>Row>Hide
--Select the column after the last column. To select the column click on the
column header or press (Ctrl + Spacebar)
--Using Shift+Ctrl+RightArrow select all columns towards right
--From menu Format>Column>Hide