Update using-fresco.en.mdx

removed merge sessions protocol export info

apps/documentation/docs/fresco/using-fresco.en.mdx

@@ -276,12 +276,6 @@ Which file type you should choose depends largely on the needs of your analysis
 
 You may configure a variety of specialized export options that will impact the data you receive in a variety of ways. These options can be left at their default values unless you know that you need to change them.
 
-#### Merge sessions by protocol
-
-The option to "Merge Sessions by Protocol" will produce a consolidated file (or files in the case of CSV) that contains all interviews. Although the file(s) will contain all egos, nodes, and edges across all interviews, the ego networks themselves will not be merged in any way.
-
-If this option is left deselected, the export process will produce separate files for each of the interviews completed.
-
 #### Use screen layout coordinates
 
 Position data from layout variables used on the Sociogram interface in Interviewer is stored on nodes as normalized x/y coordinates, with the origin in the top left of the screen. This allows you to later visualize these layouts on a canvas of arbitrary size, and to compare layouts that were created on screens with different proportions.