one of the easiest is not really deleteing.
If there is a column which will have data for any non empty row.
select everything and sort by that column.
Note there may be "" values beow the last row. If you do want these deleted
select the rows beloow the last set of data you want to keep ad edit delete
rows.
I sometimes use the Auto-Filter feature;
From desired column select (Blanks)
then click and highlight the Row-Selector (the column displaying the row
numbers)
of all such rows; and delete rows;
All blank records should disappear,
then unfilter;
HTH