ntdll: Fix size check for NtQueryInformationToken(TokenGroups).

For NtQueryInformationToken(TokenGroups), don't do a size check before
the server call, as we don't know how many SIDs there are to return
and hence the needed buffer size.

dlls/ntdll/nt.c

@@ -202,9 +202,6 @@ NTSTATUS WINAPI NtQueryInformationToken(
 
     switch (tokeninfoclass)
     {
-    case TokenGroups:
-        len = sizeof(TOKEN_GROUPS);
-        break;
     case TokenOwner:
         len = sizeof(TOKEN_OWNER) + sizeof(SID);
         break;