At the top of your procedure block or before the slice of DML code you are working with, add the setting:
SET NOCOUNT ON GO
https://msdn.microsoft.com/en-us/library/ms189837.aspx
This will prevent the summary line.
Note that this will not affect return values for SProcs; those refer to the status (0 => OK) of the resultant invocation, not the count of records affected.