tdf#54346 remove confusing description for function WEEKDAY

The output range mentioned in the function wizard is not always
1-7, but dependent of the value of argument Mode.
The output range for each possible value of argument Mode is
clearly described in the regular help for Calc.

Change-Id: I23eae9be6f8f38319496aaf4a1b7f2349e2be3eb
Reviewed-on: https://gerrit.libreoffice.org/15852Reviewed-by: Joren De Cuyper <jorendc@libreoffice.org>
Tested-by: Joren De Cuyper <jorendc@libreoffice.org>

sc/source/ui/src/scfuncs.src

@@ -1027,7 +1027,7 @@ Resource RID_SC_FUNCTION_DESCRIPTIONS1
     {
         String 1 // Description
         {
-            Text [ en-US ] = "Returns the day of the week for the date value as an integer (1-7)." ;
+            Text [ en-US ] = "Returns the day of the week for the date value as an integer." ;
         };
         ExtraData =
         {