Remove unused parameters from test code.

test/actions/src/subdir3/generate_main.py

 #!/usr/bin/env python
 
 # Copyright (c) 2009 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import sys
 
 contents = """
 #include <stdio.h>
 
-int main(int argc, char *argv[])
+int main(void)
 {
   printf("Hello from generate_main.py\\n");
   return 0;
 }
 """
 
 open(sys.argv[1], 'w').write(contents)
 
 sys.exit(0)