Merge pull request #703 from jong82/SUSER_IDtypo

typo: remove value from no value context SUSER_ID()

Author: rothja

docs/t-sql/functions/suser-sid-transact-sql.md

@@ -73,7 +73,7 @@ SUSER_SID ( [ 'login' ] [ , Param2 ] )
  The followng example returns the security identification number (SID) for the current security context.  
 
 ```  
-SELECT SUSER_SID('sa');  
+SELECT SUSER_SID();  
 ```  
 
 ### B. Using SUSER_SID with a specific login