Hi
One way
Rather than deleting, you could sort the data, and all empty rows would
fall below your data.
If existing sort order is important, then before sorting, use a spare
column adjacent to your data to number the rows.
Fill in 1 in row 1, 2 in row 2, mark both cells and double click the
fill handle to fill down (the fill handle is the small black cross that
appears if you hovver overe the bottom right of the pair of marked
cells)
Sort your data on a column other than this new column, and all the empty
rows (other than the number you have inserted) will fall to the bottom.
Highlight this block of rows at the bottom of your sheet and delete
them.
Then sort by the column with the numbers, to get the file back into
original sort order.
Delete added column if required.