First round of dead file removal

experimental/tools/tests/hello_world_gdb.c

Index: experimental/tools/tests/hello_world_gdb.c
diff --git a/experimental/tools/tests/hello_world_gdb.c b/experimental/tools/tests/hello_world_gdb.c
deleted file mode 100644
index 4539aa82dfe428db8a28b7d034b8bf06e62b956f..0000000000000000000000000000000000000000
--- a/experimental/tools/tests/hello_world_gdb.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Copyright 2008 The Native Client Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can
- * be found in the LICENSE file.
- */
-
-/*
-   It can't get much simpler than this (uh, except for noop.c).
-*/
-
-#include <stdio.h>
-
-void hello_world() {
-  printf("Hello, World!\n");
-}
-
-int main(int argc, char* argv[]) {
-  hello_world();
-  return 0;
-}