Highlight the area of your spreadsheet in which you want to delete the blank rows/colums. Be sure to include the row just above the first blank row and the row just below the last blank row.
>> Navigate to
Home -->
Editing -->
Find & Select -->
Go To Special… -->
Blanks>> All the cells in the selection that are not blank are de-selected, leaving only the blank cells selected.
>> Now navigate to
Home -->
Cells -->
Delete and then select “
Delete Sheet Rows/Delete Sheet Columns”
All the blank rows/columns will be removed!
ref.