tests2: cleanup

- remove -norunsrc switch
  Meaning and usage (-run -norun...???) look sort of screwed.  Also
  general usefulness is unclear, so it was actually to support exactly
  one (not even very interesting) test

This partially reverts e31579b076

tests/tests2/31_args.c

@@ -5,7 +5,7 @@ int main(int argc, char **argv)
    int Count;
 
    printf("hello world %d\n", argc);
-   for (Count = 0; Count < argc; Count++)
+   for (Count = 1; Count < argc; Count++)
       printf("arg %d: %s\n", Count, argv[Count]);
 
    return 0;